About Day1Data
est. 2024.
This was me on my last day at Farfetch.
This was me on my last day at Farfetch.
We used a big consultancy (over £500k/year!) to determine marketing incrementality & measure brand spend. I sat in those meetings, looking at the results and thought: “this is cool but why should it only be available to companies with massive budgets?”
That question stuck with me and led me to build Day1Data. We make this kind of marketing insight available to companies like Healf, PerfectTed & WorldRemit, who have achieved 20x marketing ROI from working with us.
Traditional data consultancy is broken.
The old model
Big firms charge upwards of £50k annually for a single model while handing your account to inexperienced junior staff. Even excel formulae are closely guarded, leaving you scrambling if you ever want to move away from their services.
Big firms charge upwards of £50k annually for a single model while handing your account to inexperienced junior staff. Even excel formulae are closely guarded, leaving you scrambling if you ever want to move away from their services.
The Day1Data difference
Day1Data was built to be different. Experienced senior staff work on every account, our MMM prices start from just £5295/mo and you own 100% of the data infrastructure we build for you.
Meet the team: senior leaders from Meta, FarFetch, Monzo, Dentsu, Ebiquity and more.
Meet the team: senior leaders from Meta, FarFetch, Monzo, Dentsu, Ebiquity and more.
Meet the team: senior leaders from Meta, FarFetch, Monzo, Dentsu, Ebiquity and more.
Life at Day1Data
Life at Day1Data
Mentorship and progression are prioritised
As a lean team, more junior staff are constantly collaborating with our team of senior leaders. Our vertical leads come from Meta, Monzo and Ebiquity, each with over a decade of experience.
As a lean team, more junior staff are constantly collaborating with our team of senior leaders. Our vertical leads come from Meta, Monzo and Ebiquity, each with over a decade of experience.
Collaboration is key
Team spirit is not something left to chance at Day1Data! Every client has several D1 folks working together, bringing different skill sets to the table. We have weekly team lunches and frequent socials too!
Team spirit is not something left to chance at Day1Data! Every client has several D1 folks working together, bringing different skill sets to the table. We have weekly team lunches and frequent socials too!
Over-communication always
Always over communicate
A successful partnership with a client depends on frequent and clear communication. We prioritise smooth onboarding and rapid progress by ensuring everyone is clear on what they need to do. Both internally and in our work with clients we pride ourselves on the quality and clarity of our communication.
A successful partnership with a client depends on frequent and clear communication. We prioritise smooth onboarding and rapid progress by ensuring everyone is clear on what they need to do. Both internally and in our work with clients we pride ourselves on the quality and clarity of our communication.
A successful partnership with a client depends on frequent and clear communication.
Both internally and in our work with clients we pride ourselves on the quality and clarity of our communication.
Explore careers
Featured reading
INSIGHT
Trends to Watch in 2025
How AI, privacy, and real-time analytics are shaping data’s future
Read article →
INSIGHT
Why Data-Driven Decisions Matter
How data insights can supercharge your business
Read article →
INSIGHT
5 Essential Steps to Build a Data-Driven Culture
Empower your team with data-driven thinking
Read article →
What people are saying about Day1Data
What people are saying about Day1Data
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
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
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
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
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
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
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
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