Unlock profitable growth.
Unlock profitable growth.
Marketing science, data foundations, analytics and AI capabilities for high-growth teams.
Trusted by the world's biggest brands.
Multiple problems. The same need for evidence-backed decisions.
Bottom-of-funnel channels claim all the credit. You can't measure brand impact.
Your channels all claim the credit. You can’t tell which one earned it.
Measure your real marketing ROI per channel; know where to spend more and where to stop.
MMM, incrementality testing and attribution.
See the true ROI of every channel and optimise spend with confidence.
You have data, but it isn’t ready to guide growth.
Build a data infrastructure and reporting foundation that scales.
Automated data ingestion, removal of silos, real-time dashboards, and AI enablement.
Turn reliable data into reporting that guides daily growth decisions.
Your challenge needs a custom approach.
We shape the data, measurement and delivery around how your business works.
Custom apps, machine learning, AI and more.
Get a tailored data and measurement programme built around your business.
HOW WE WORK
Your data partner - driving growth, together.
We work to your timelines, with your tech stack and to your priorities.
Find out how we tailor our services to you.
Learn how we help businesses like yours.
Custom Influencer Tracker for Amazon
Influencer comms, enterprise
Custom web app and light database for tracking influencer activity, saving over 600 days annually across 28 countries.
Custom web app and light database for tracking influencer activity, saving over 600 days annually across 28 countries.
Marketing Effectiveness for Booksy
appointment marketplace b2b and b2c
Multi-market MMM (US and Poland) to determine incremental ROI on media spend.
Multi-market MMM (US and Poland) to determine incremental ROI on media spend.
Data Foundations with Fussy
personal care dtc
Data infrastructure and visualisations leading to AI-enabled decision-making.
Data infrastructure and visualisations leading to AI-enabled decision-making.
Why choose Day1Data?
Senior thinking, in the room.
Industry leaders from Meta, Farfetch, Monzo and Ebiquity.
Meet the team
Meet the team
Jake Barnett
Founder & CEO | Tesco, Farfetch
John Napoleon-Kuofie
Co-Founder & CTO | Monzo, Dentsu, Farfetch
James Stuart-Smith
Head of Analytics | Meta, Intuit, Samsung
Kris Gant
Head of Marketing Effectiveness | Ebiquity
Britt Dewing
Founder's Associate | Cambridge Graduate
Michael Siena
Senior Data Scientist | Cambridge PhD
George Gascoine
Marketing Scientist | Ebiquity
No black boxes.
Methods your team can understand, trust and use.
Built for adoption.
We educate teams on how to use our solutions so the impact compounds after launch.
Discover our approach.
We leave behind systems, capability and clarity that continue to compound long after launch. Discover the Day1Data difference.
We leave behind systems, capability and clarity that continue to compound long after launch.
Discover the Day1Data difference.
Book a call
Compatible with your tech stack.
Marketing effectiveness and data foundations under one roof.
WHY CHOOSE DAY1DATA
The benefits of Day1Data vs …
01
Off-the-shelf SaaS products
Off-the-shelf SaaS products
SaaS MMM and BI tools have limited flexibility - if your data sources are less common, you may not be able to connect them. We offer full customisation and have experience working with all kinds of complex set-ups!
02
Larger agencies
Larger agencies
Larger agencies hand you a black-box model and a junior account team. We show our working at every step, led by senior analysts, without the large agency price tag.
03
In-house team or contractors
In-house team or contractors
Hiring in-house takes months and ties you to one person's bandwidth. We offer a senior team scoped to the project, with none of the recruitment cycle or long-term overhead.
Frequently Asked Questions
Frequently Asked Questions
Frequently Asked Questions
What actually are data foundations?
Data foundations are the infrastructure and reporting capabilities needed for you to access, visualise and use your data reliably and effortlessly. This includes automated ingestion pipelines, data warehouses, semantic layers, contextual layers, BI dashboarding and AI enablement.
What does Day1Data actually do?
We help companies leverage their data for growth across three services: marketing effectiveness (MMM, incrementality testing and custom analytics), data foundations (data infrastructure, reporting and AI enablement), and custom projects. Previous custom projects include a bespoke influencer tracker for Amazon, automated testing analysis pipelines for Global Media and an influencer performance and pricing calculator for Buttermilk.
How long does it take?
Our MMM work can deliver your first model in as little as 6 weeks. Full data foundations, including AI enablement, take 90 days: in week one we learn your business and get access to your data, by the end of month one your warehouse, data pipelines and core KPIs are in place, and in month two we add dashboards and the ability to ask your data questions in plain English. We’ll confirm an exact timeline before you sign anything.
Why choose Day1Data over a SaaS tool?
Software gives you a dashboard. We give you a team that interrogates the numbers and tells you what to do next. SaaS products often lack flexibility and may not support all of your data sources. Fundamentally, reliably feeding your data into a SaaS tool is not possible without proper data foundations, which we can set up for you.
We don’t have a data team. Is that a problem?
No, that’s who this is for. We act as your data team while we build, and set everything up so your existing teams can use it without needing an analyst for every question.
Why choose Day1Data over a big agency?
Full transparency, no bureaucracy and senior leadership on your account every step of the way. Large agencies charge up to 10x our prices, while their tight protection over their IP makes it difficult to know if you can trust their work. Our founders are always on hand to answer any questions personally, and every account is worked on by experienced, senior staff.
Do we own what you build?
Yes. Everything sits in your own accounts, so it’s yours, and you’re never locked into us.
Why not hire in-house?
High-calibre analysis from day one, without the cost or risk of building a data science team first. Hiring in-house takes months, costs a small fortune and ties you to one person's bandwidth and skillset. Working with Day1Data gives you access to the full breadth of our expertise, without the overhead of an additional employee.
How much does it cost?
Our MMM services start from just £5295 /mo. Data foundations pricing depends on how many systems you have and how complex your business is. Book a call and we’ll give you a fixed quote after a short scoping session.
Can I see examples of the results you've delivered?
We have worked with companies of all sizes, from startups like PerfectTed to enterprise clients like Amazon. Read about our work on our case study page. We're also happy to provide references so you can hear first-hand what it's like to work with us.
I had the pleasure of working with D1 when they implemented experimentation & analytics solutions to help us measure our branded content activities. They are super knowledgeable about Marketing Analytics and were able to translate complex solutions that we could all understand.
Marisa Poster
PerfectTed, Co-Founder
Great team to work with. Deep expertise across MMM, LTV and MTA. Biggest win for me is the team is delivering high-value, auditable work that drives results - not a black box presentation for CMOs where no one looks under the hood and a real focus on making sure the outputs actually get used!
Faizal Kassam
WorldRemit, Marketing Science Lead
Day1Data has been revolutionary for Twilio. We now have a steer on the reasons for our sales performance & the marketing contribution to revenue. This has helped us spend much more efficiently.
Rupali Singhal
Twilio, Head of International Marketing Analytics
We chose D1D over the others because I didn't want to get locked into yet another platform that wouldn't give me a custom solution & I wanted a better way to measure attribution than GA4. We love working with Day1!
Jamie Freed
Vieve Beauty, Chief Customer Experience Officer
Day1Data helped us move from siloed data sources to a more scalable, automated data foundation. They aligned our teams around consistent KPIs, connected our core data sources into BigQuery and built a validated semantic layer we can trust. It has given us a stronger base for reporting, decision-making and AI use cases.
Justus Buchen
Filu, COO
The team has been crucial in helping us to expand to Africa. The data warehouse and reporting suite digitalised our approach to marketing budget allocation and set us up for long-term success.
Freddy Lau
Hantec Financial, Group CEO
We loved working with D1 - they set up our marketing reporting & gave us solid insights that actually improved our marketing efficiency!
Ivo Devereux
Sapling Spirits, Co-Founder
We started working with D1 as we wanted to make data-informed decisions & remove manual reporting. They helped us in a really transparent way, setting up our warehouse, reporting suite and marketing analytics. We trust them and would definitely recommend.
Jacob Green
Hylo Athletics, Managing Director
I had the pleasure of working with D1 when they implemented experimentation & analytics solutions to help us measure our branded content activities. They are super knowledgeable about Marketing Analytics and were able to translate complex solutions that we could all understand.
Marisa Poster
PerfectTed, Co-Founder
Great team to work with. Deep expertise across MMM, LTV and MTA. Biggest win for me is the team is delivering high-value, auditable work that drives results - not a black box presentation for CMOs where no one looks under the hood and a real focus on making sure the outputs actually get used!
Faizal Kassam
WorldRemit, Marketing Science Lead
Day1Data has been revolutionary for Twilio. We now have a steer on the reasons for our sales performance & the marketing contribution to revenue. This has helped us spend much more efficiently.
Rupali Singhal
Twilio, Head of International Marketing Analytics
We chose D1D over the others because I didn't want to get locked into yet another platform that wouldn't give me a custom solution & I wanted a better way to measure attribution than GA4. We love working with Day1!
Jamie Freed
Vieve Beauty, Chief Customer Experience Officer
Day1Data helped us move from siloed data sources to a more scalable, automated data foundation. They aligned our teams around consistent KPIs, connected our core data sources into BigQuery and built a validated semantic layer we can trust. It has given us a stronger base for reporting, decision-making and AI use cases.
Justus Buchen
Filu, COO
The team has been crucial in helping us to expand to Africa. The data warehouse and reporting suite digitalised our approach to marketing budget allocation and set us up for long-term success.
Freddy Lau
Hantec Financial, Group CEO
We loved working with D1 - they set up our marketing reporting & gave us solid insights that actually improved our marketing efficiency!
Ivo Devereux
Sapling Spirits, Co-Founder
We started working with D1 as we wanted to make data-informed decisions & remove manual reporting. They helped us in a really transparent way, setting up our warehouse, reporting suite and marketing analytics. We trust them and would definitely recommend.
Jacob Green
Hylo Athletics, Managing Director
I had the pleasure of working with D1 when they implemented experimentation & analytics solutions to help us measure our branded content activities. They are super knowledgeable about Marketing Analytics and were able to translate complex solutions that we could all understand.
Marisa Poster
PerfectTed, Co-Founder
Great team to work with. Deep expertise across MMM, LTV and MTA. Biggest win for me is the team is delivering high-value, auditable work that drives results - not a black box presentation for CMOs where no one looks under the hood and a real focus on making sure the outputs actually get used!
Faizal Kassam
WorldRemit, Marketing Science Lead
Day1Data has been revolutionary for Twilio. We now have a steer on the reasons for our sales performance & the marketing contribution to revenue. This has helped us spend much more efficiently.
Rupali Singhal
Twilio, Head of International Marketing Analytics
We chose D1D over the others because I didn't want to get locked into yet another platform that wouldn't give me a custom solution & I wanted a better way to measure attribution than GA4. We love working with Day1!
Jamie Freed
Vieve Beauty, Chief Customer Experience Officer
Day1Data helped us move from siloed data sources to a more scalable, automated data foundation. They aligned our teams around consistent KPIs, connected our core data sources into BigQuery and built a validated semantic layer we can trust. It has given us a stronger base for reporting, decision-making and AI use cases.
Justus Buchen
Filu, COO
The team has been crucial in helping us to expand to Africa. The data warehouse and reporting suite digitalised our approach to marketing budget allocation and set us up for long-term success.
Freddy Lau
Hantec Financial, Group CEO
We loved working with D1 - they set up our marketing reporting & gave us solid insights that actually improved our marketing efficiency!
Ivo Devereux
Sapling Spirits, Co-Founder
We started working with D1 as we wanted to make data-informed decisions & remove manual reporting. They helped us in a really transparent way, setting up our warehouse, reporting suite and marketing analytics. We trust them and would definitely recommend.
Jacob Green
Hylo Athletics, Managing Director
I had the pleasure of working with D1 when they implemented experimentation & analytics solutions to help us measure our branded content activities. They are super knowledgeable about Marketing Analytics and were able to translate complex solutions that we could all understand.
Marisa Poster
PerfectTed, Co-Founder
Great team to work with. Deep expertise across MMM, LTV and MTA. Biggest win for me is the team is delivering high-value, auditable work that drives results - not a black box presentation for CMOs where no one looks under the hood and a real focus on making sure the outputs actually get used!
Faizal Kassam
WorldRemit, Marketing Science Lead
Day1Data has been revolutionary for Twilio. We now have a steer on the reasons for our sales performance & the marketing contribution to revenue. This has helped us spend much more efficiently.
Rupali Singhal
Twilio, Head of International Marketing Analytics
We chose D1D over the others because I didn't want to get locked into yet another platform that wouldn't give me a custom solution & I wanted a better way to measure attribution than GA4. We love working with Day1!
Jamie Freed
Vieve Beauty, Chief Customer Experience Officer
Day1Data helped us move from siloed data sources to a more scalable, automated data foundation. They aligned our teams around consistent KPIs, connected our core data sources into BigQuery and built a validated semantic layer we can trust. It has given us a stronger base for reporting, decision-making and AI use cases.
Justus Buchen
Filu, COO
The team has been crucial in helping us to expand to Africa. The data warehouse and reporting suite digitalised our approach to marketing budget allocation and set us up for long-term success.
Freddy Lau
Hantec Financial, Group CEO
We loved working with D1 - they set up our marketing reporting & gave us solid insights that actually improved our marketing efficiency!
Ivo Devereux
Sapling Spirits, Co-Founder
We started working with D1 as we wanted to make data-informed decisions & remove manual reporting. They helped us in a really transparent way, setting up our warehouse, reporting suite and marketing analytics. We trust them and would definitely recommend.
Jacob Green
Hylo Athletics, Managing Director
I had the pleasure of working with D1 when they implemented experimentation & analytics solutions to help us measure our branded content activities. They are super knowledgeable about Marketing Analytics and were able to translate complex solutions that we could all understand.
Marisa Poster
PerfectTed, Co-Founder
Great team to work with. Deep expertise across MMM, LTV and MTA. Biggest win for me is the team is delivering high-value, auditable work that drives results - not a black box presentation for CMOs where no one looks under the hood and a real focus on making sure the outputs actually get used!
Faizal Kassam
WorldRemit, Marketing Science Lead
Day1Data has been revolutionary for Twilio. We now have a steer on the reasons for our sales performance & the marketing contribution to revenue. This has helped us spend much more efficiently.
Rupali Singhal
Twilio, Head of International Marketing Analytics
We chose D1D over the others because I didn't want to get locked into yet another platform that wouldn't give me a custom solution & I wanted a better way to measure attribution than GA4. We love working with Day1!
Jamie Freed
Vieve Beauty, Chief Customer Experience Officer
Day1Data helped us move from siloed data sources to a more scalable, automated data foundation. They aligned our teams around consistent KPIs, connected our core data sources into BigQuery and built a validated semantic layer we can trust. It has given us a stronger base for reporting, decision-making and AI use cases.
Justus Buchen
Filu, COO
The team has been crucial in helping us to expand to Africa. The data warehouse and reporting suite digitalised our approach to marketing budget allocation and set us up for long-term success.
Freddy Lau
Hantec Financial, Group CEO
We loved working with D1 - they set up our marketing reporting & gave us solid insights that actually improved our marketing efficiency!
Ivo Devereux
Sapling Spirits, Co-Founder
We started working with D1 as we wanted to make data-informed decisions & remove manual reporting. They helped us in a really transparent way, setting up our warehouse, reporting suite and marketing analytics. We trust them and would definitely recommend.
Jacob Green
Hylo Athletics, Managing Director
I had the pleasure of working with D1 when they implemented experimentation & analytics solutions to help us measure our branded content activities. They are super knowledgeable about Marketing Analytics and were able to translate complex solutions that we could all understand.
Marisa Poster
PerfectTed, Co-Founder
Great team to work with. Deep expertise across MMM, LTV and MTA. Biggest win for me is the team is delivering high-value, auditable work that drives results - not a black box presentation for CMOs where no one looks under the hood and a real focus on making sure the outputs actually get used!
Faizal Kassam
WorldRemit, Marketing Science Lead
Day1Data has been revolutionary for Twilio. We now have a steer on the reasons for our sales performance & the marketing contribution to revenue. This has helped us spend much more efficiently.
Rupali Singhal
Twilio, Head of International Marketing Analytics
We chose D1D over the others because I didn't want to get locked into yet another platform that wouldn't give me a custom solution & I wanted a better way to measure attribution than GA4. We love working with Day1!
Jamie Freed
Vieve Beauty, Chief Customer Experience Officer
Day1Data helped us move from siloed data sources to a more scalable, automated data foundation. They aligned our teams around consistent KPIs, connected our core data sources into BigQuery and built a validated semantic layer we can trust. It has given us a stronger base for reporting, decision-making and AI use cases.
Justus Buchen
Filu, COO
The team has been crucial in helping us to expand to Africa. The data warehouse and reporting suite digitalised our approach to marketing budget allocation and set us up for long-term success.
Freddy Lau
Hantec Financial, Group CEO
We loved working with D1 - they set up our marketing reporting & gave us solid insights that actually improved our marketing efficiency!
Ivo Devereux
Sapling Spirits, Co-Founder
We started working with D1 as we wanted to make data-informed decisions & remove manual reporting. They helped us in a really transparent way, setting up our warehouse, reporting suite and marketing analytics. We trust them and would definitely recommend.
Jacob Green
Hylo Athletics, Managing Director
I had the pleasure of working with D1 when they implemented experimentation & analytics solutions to help us measure our branded content activities. They are super knowledgeable about Marketing Analytics and were able to translate complex solutions that we could all understand.
Marisa Poster
PerfectTed, Co-Founder
Great team to work with. Deep expertise across MMM, LTV and MTA. Biggest win for me is the team is delivering high-value, auditable work that drives results - not a black box presentation for CMOs where no one looks under the hood and a real focus on making sure the outputs actually get used!
Faizal Kassam
WorldRemit, Marketing Science Lead
Day1Data has been revolutionary for Twilio. We now have a steer on the reasons for our sales performance & the marketing contribution to revenue. This has helped us spend much more efficiently.
Rupali Singhal
Twilio, Head of International Marketing Analytics
We chose D1D over the others because I didn't want to get locked into yet another platform that wouldn't give me a custom solution & I wanted a better way to measure attribution than GA4. We love working with Day1!
Jamie Freed
Vieve Beauty, Chief Customer Experience Officer
Day1Data helped us move from siloed data sources to a more scalable, automated data foundation. They aligned our teams around consistent KPIs, connected our core data sources into BigQuery and built a validated semantic layer we can trust. It has given us a stronger base for reporting, decision-making and AI use cases.
Justus Buchen
Filu, COO
The team has been crucial in helping us to expand to Africa. The data warehouse and reporting suite digitalised our approach to marketing budget allocation and set us up for long-term success.
Freddy Lau
Hantec Financial, Group CEO
We loved working with D1 - they set up our marketing reporting & gave us solid insights that actually improved our marketing efficiency!
Ivo Devereux
Sapling Spirits, Co-Founder
We started working with D1 as we wanted to make data-informed decisions & remove manual reporting. They helped us in a really transparent way, setting up our warehouse, reporting suite and marketing analytics. We trust them and would definitely recommend.
Jacob Green
Hylo Athletics, Managing Director
I had the pleasure of working with D1 when they implemented experimentation & analytics solutions to help us measure our branded content activities. They are super knowledgeable about Marketing Analytics and were able to translate complex solutions that we could all understand.
Marisa Poster
PerfectTed, Co-Founder
Great team to work with. Deep expertise across MMM, LTV and MTA. Biggest win for me is the team is delivering high-value, auditable work that drives results - not a black box presentation for CMOs where no one looks under the hood and a real focus on making sure the outputs actually get used!
Faizal Kassam
WorldRemit, Marketing Science Lead
Day1Data has been revolutionary for Twilio. We now have a steer on the reasons for our sales performance & the marketing contribution to revenue. This has helped us spend much more efficiently.
Rupali Singhal
Twilio, Head of International Marketing Analytics
We chose D1D over the others because I didn't want to get locked into yet another platform that wouldn't give me a custom solution & I wanted a better way to measure attribution than GA4. We love working with Day1!
Jamie Freed
Vieve Beauty, Chief Customer Experience Officer
Day1Data helped us move from siloed data sources to a more scalable, automated data foundation. They aligned our teams around consistent KPIs, connected our core data sources into BigQuery and built a validated semantic layer we can trust. It has given us a stronger base for reporting, decision-making and AI use cases.
Justus Buchen
Filu, COO
The team has been crucial in helping us to expand to Africa. The data warehouse and reporting suite digitalised our approach to marketing budget allocation and set us up for long-term success.
Freddy Lau
Hantec Financial, Group CEO
We loved working with D1 - they set up our marketing reporting & gave us solid insights that actually improved our marketing efficiency!
Ivo Devereux
Sapling Spirits, Co-Founder
We started working with D1 as we wanted to make data-informed decisions & remove manual reporting. They helped us in a really transparent way, setting up our warehouse, reporting suite and marketing analytics. We trust them and would definitely recommend.
Jacob Green
Hylo Athletics, Managing Director
I had the pleasure of working with D1 when they implemented experimentation & analytics solutions to help us measure our branded content activities. They are super knowledgeable about Marketing Analytics and were able to translate complex solutions that we could all understand.
Marisa Poster
PerfectTed, Co-Founder
Great team to work with. Deep expertise across MMM, LTV and MTA. Biggest win for me is the team is delivering high-value, auditable work that drives results - not a black box presentation for CMOs where no one looks under the hood and a real focus on making sure the outputs actually get used!
Faizal Kassam
WorldRemit, Marketing Science Lead
Day1Data has been revolutionary for Twilio. We now have a steer on the reasons for our sales performance & the marketing contribution to revenue. This has helped us spend much more efficiently.
Rupali Singhal
Twilio, Head of International Marketing Analytics
We chose D1D over the others because I didn't want to get locked into yet another platform that wouldn't give me a custom solution & I wanted a better way to measure attribution than GA4. We love working with Day1!
Jamie Freed
Vieve Beauty, Chief Customer Experience Officer
Day1Data helped us move from siloed data sources to a more scalable, automated data foundation. They aligned our teams around consistent KPIs, connected our core data sources into BigQuery and built a validated semantic layer we can trust. It has given us a stronger base for reporting, decision-making and AI use cases.
Justus Buchen
Filu, COO
The team has been crucial in helping us to expand to Africa. The data warehouse and reporting suite digitalised our approach to marketing budget allocation and set us up for long-term success.
Freddy Lau
Hantec Financial, Group CEO
We loved working with D1 - they set up our marketing reporting & gave us solid insights that actually improved our marketing efficiency!
Ivo Devereux
Sapling Spirits, Co-Founder
We started working with D1 as we wanted to make data-informed decisions & remove manual reporting. They helped us in a really transparent way, setting up our warehouse, reporting suite and marketing analytics. We trust them and would definitely recommend.
Jacob Green
Hylo Athletics, Managing Director