Driven by Mobile.
Delivered Anywhere.

The sell-side omnichannel advertising platform powered by real-time mobile audiences.

Thousands
of Publishers
Trust Start.io
30B
Software Downloads
(SDK)
2.5B
Monthly Active Users
(MAUs)

What we do for developers and publishers

Start.io helps mobile app developers and website publishers make money with ads. We deliver hundreds of millions of ads each day to thousands of top developers and publishers.

What we do for brands and agencies

Start.io gathers billions of first-party,
privacy-compliant consumer signals
every day, processed at scale using
artificial intelligence

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Mobile AI
Audiences

Maia is an easy-to-use, single frame
platform for audience exploration and activation.

What our clients say
StackAdapt

As an industry-leading DSP, StackAdapt partners with high-performing supply-side platforms to connect premium supply with premium demand. Start.io has been an incredible partner for us, giving our clients better access to a diverse, global, mobile audience.

Kevin Bhawnani
Lead, Solutions at StackAdapt
LiveRamp

Start.io’s first-party data has been available on LiveRamp across several countries since 2018 and can be activated on many platforms. Start.io has a rich, scalable, and diversified audience catalog, trusted by our data buyers.

Jill Maiolfi
Global Data Partnership Director at LiveRamp
Umlaut

Collaborating with Start.io has helped us create new insights and improve our product for our clients worldwide.

Carlos Teijeiro
Business Unit Lead at Umlaut
M8

With the help of Start.io, we’ve experienced over-performing CTR metrics, driving qualified sessions to our site. Start.io’s data-driven approach and execution elevated conversion rates and increased the brand presence of our clients, resulting in overall high performance.

Natalie Garcia
Paid Media Lead at M8
Mobincube

I am excited to be working with Start.io because it has really helped us deliver what our customers need from us.

Fernando Marzal Coquillat
Co-Founder and CEO at Mobincube
M&C Saatchi Mobile

We worked with Start.io very closely which helped us a lot when it came to dealing with the challenges we needed to address.

Chris Mumford
Trading Director at M&C Saatchi Mobile
PubMatic

For over two years, Start.io has been one of our important partners, working with us to help our customers achieve their demand goal with high-quality inventory.

Jaan Janes
VP, Customer Success, Americas at PubMatic
Proof Advertising

We have partnered with Start.io across multiple clients for several years. They have been a great partner and we enjoy collaborating with them to develop unique mobile-first ways to meet our clients goals and objectives. Their platform provides trusted scale and we have seen proven quality results.

Heather Hager
Director of Media Services at Proof Advertising

What you should know about us

What does Start.io do?

Start.io is a mobile advertising technology platform with AI at its core. It helps app developers and publishers generate revenue by delivering accurate, relevant ads. Developers and publishers can integrate their tech stack with the Start.io platform using multiple methods and gain access to real-time bidding from tier-one DSPs and advertising agencies.

Which ad formats and ad standards does Start.io support?

Start.io is a member of the IAB (Interactive Advertising Bureau) and supports all mobile in-app ad formats and standards, including banner, interstitial, native, video, and more.

What is Maia?

Maia is Start.io's NLP-driven (Natural Language Processing) audience AI engine. Leveraging over 100 billion mobile data signals daily, Maia creates accurate audiences in real time that can be activated around the globe. With Maia, you can explore, build, and activate mobile audience segments based on real-world behaviors, interests, and intent signals.

What are the key stats related to Start.io's operations?

Start.io delivers hundreds of millions of ads per day across thousands of leading global apps, using AI to make digital advertising campaigns more efficient, effective, and precise. Our direct integration with thousands of mobile app developers gives us access to more than 100 billion first-party data signals per day worldwide. Marketers use these anonymized signals to understand and predict consumer behavior, identify new opportunities, and fuel business growth.

Is Start.io an SSP?

Yes. An SSP (supply-side platform or sell-side platform) is software that enables publishers and media owners to automate the management, sale, and optimization of their digital ad inventory. Start.io is an in-app mobile SSP that works with app developers to run global ad campaigns using programmatic demand and real-time bidding (RTB) auctions, delivering the most relevant ad for each impression.

What should an app developer (publisher) expect from integrating the Start.io platform?

The Start.io platform focuses on yield optimization for app developers, using machine-learning-driven pricing that adapts per impression to capture the highest CPM (the cost an advertiser pays for every 1,000 impressions) and incremental revenue.

What ad-quality and user-experience controls are built into the Start.io platform?

Start.io uses granular block lists, category filters, third-party creative-review solutions, and frequency capping to ensure that ads served inside your app meet brand-safety and user-experience standards.

How does Start.io create audiences and deliver targeting solutions?

Start.io's platform analyzes over 100 billion mobile data signals daily—including app usage patterns, location (where permitted), purchase intent, and device-graph attributes. Audience and segment targeting is built on observed behavior rather than probabilistic modeling alone, with optional enhancement through alternative-ID and identity-resolution partners.

What is the scale of Start.io's platform?

Start.io connects directly to thousands of mobile app developers and other SSPs, resulting in global coverage (with the exception of users in China). The platform delivers ads across mobile app categories and locations, reaching over 2.5 billion monthly active users on both iOS and Android.

Can Start.io's audiences be activated outside of mobile in-app?

Yes. Start.io's audiences can be activated across operating systems and channels, including connected TV (CTV), when accessed through leading DSPs.

Which privacy policies and regulations does Start.io comply with?

Start.io operates a first-party data framework built around explicit user consent and verifiable compliance with global privacy regulations. The platform supports GDPR, CCPA/CPRA, COPPA, and LGPD, among other local regulations.

What types of app developers are on the Start.io platform?

Start.io works directly with globally leading app developers, resulting in premium media supply. Trusted by tier-one DSPs, Start.io delivers ads across categories including games, business, finance, lifestyle, shopping, and many more. Start advertising anywhere. Let's talk, or email us at marketing@start.io.