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 which scale.
Automated data ingestion, removal of siloes, 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.
Data Foundations with Fussy
personal care d2c
Data infrastructure and visualisations leading to AI enabled decision making.
Data infrastructure and visualisations leading to AI enabled decision making.
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.
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.
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
Advisor | 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
Misha Freidin
Lead Analytics Engineer | Omnicom
Michael Siena
Senior Data Scientist | Cambridge PhD
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
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 hand you a black-box model and a junior account team. We show our working at every step, led by senior analysts, without the agency price tag.
03
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 does Day1Data actually do?
We help companies get more from their data across marketing effectiveness, data foundations and custom projects.
What does Day1Data actually do?
We help companies get more from their data across marketing effectiveness, data foundations and custom projects.
What marketing effectiveness services do you offer?
We offer three services, which can be used to fully triangulate which channels should get credit. These are MMM, which is the most statistically rigorous overall view, incrementality testing (the gold standard for validating MMMs) and attribution modelling.
What marketing effectiveness services do you offer?
We offer three services, which can be used to fully triangulate which channels should get credit. These are MMM, which is the most statistically rigorous overall view, incrementality testing (the gold standard for validating MMMs) and attribution modelling.
What actually are data foundations?
Data foundations are everything which allow you to make confident decisions off the back of your data. It includes data warehousing, ingestion pipelines, modelling and dashboarding. On top of that we also build semantic layers which allow businesses to integrate AI with their data infrastructure.
What actually are data foundations?
Data foundations are everything which allow you to make confident decisions off the back of your data. It includes data warehousing, ingestion pipelines, modelling and dashboarding. On top of that we also build semantic layers which allow businesses to integrate AI with their data infrastructure.
How much do you cost?
Our MMM services start from just £5295 /mo, with incrementality testing available as an add-on for £500 per month. Our data foundations services are highly bespoke and depend on your existing setup, so we’ll need to chat to you to provide an accurate quote.
How much do you cost?
Our MMM services start from just £5295 /mo, with incrementality testing available as an add-on for £500 per month. Our data foundations services are highly bespoke and depend on your existing setup, so we’ll need to chat to you to provide an accurate quote.
Is my company the right size to work with Day1Data?
We work with companies of all stages - from startups all the way to multi-billion dollar enterprises like Amazon. Our MMM work is suited to companies with significant media spend in order to get an accurate read, and very early stage startups may not have enough data to find our foundations work useful. Book a call and we can have an honest discussion about whether our services are right for you now.
Is my company the right size to work with Day1Data?
We work with companies of all stages - from startups all the way to multi-billion dollar enterprises like Amazon. Our MMM work is suited to companies with significant media spend in order to get an accurate read, and very early stage startups may not have enough data to find our foundations work useful. Book a call and we can have an honest discussion about whether our services are right for you now.
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