Apostra rebrands from Scope3 to expand AI agent ad platform

Traders Union
All News
Financial News
Apostra rebrands AI ad platform

Highlights

Apostra, formerly Scope3, rebrands to expand its AI agent-based ad platform, aiming to streamline agent-to-agent transactions without separate integrations for thousands of publishers.
Platform leverages the AdCP protocol, has built adapters for Google, Meta, Amazon, Reddit, and ChatGPT Ads, is working with 40 media partners, and is executing seven-figure campaigns, including a $1 million U.S. test in April.
After two layoff rounds reducing headcount from over 100 to about 40, Apostra pivots from carbon tracking as revenue growth slowed, and plans to seek additional funding by mid-2026.

Rebrand centers on agentic media buying

As first reported by Business Insider, citing CMO Insider, Apostra is replacing the Scope3 name as the company pushes to build a neutral platform for agent-to-agent advertising transactions. O'Kelley and cofounder Anne Coghlan said the system is designed to spare marketers from building separate integrations with thousands of publishers, platforms, and other media providers.

The platform uses AdCP, a protocol created last year by a consortium of adtech companies including Scope3, to give advertising agents a common language for interaction. Apostra said that framework helps marketers place campaigns in channels that are harder to reach through traditional programmatic buying, including social media walled gardens, podcasts and out-of-home inventory.

Rather than bidding on individual ad impressions in real time, Apostra is built to automate slower parts of media buying such as discovery, negotiation, approvals and execution. The company said it is working with 40 media partners, has built AdCP adapters for major ad platforms including Google, Meta, Amazon, Reddit and ChatGPT Ads, and is already running seven-figure campaigns through the system.

O'Kelley said one unnamed major brand started with a $1 million U.S. campaign in April and then expanded the test into other markets and channels. Apostra said it does not take transaction fees or a share of media spend, and instead plans to sell add-on intelligence tools including proposal evaluation, negotiation support, catalog integration and currency handling.

Pivot follows layoffs and adtech strategy shift

The rebrand marks another strategic turn in O'Kelley's long adtech career, after earlier roles at Right Media and AppNexus. He said he had planned since 2022 to move Scope3 beyond its original carbon-tracking business, but 2025 became the turning point as companies pulled back sustainability programs and the business no longer supported the growth trajectory he wanted.

Scope3 had raised $60 million in total, according to O'Kelley. He said the company had been doubling revenue each year until the sustainability business slowed, leading management to put its full focus on the Apostra project, which first launched as an agentic media platform in March 2025.

The company has also cut costs during the transition. O'Kelley said Apostra went through two rounds of layoffs over the past year and reduced headcount from more than 100 employees to about 40, describing the launch as a "burn the boats" moment for the company.

Adoption remains uncertain because large marketers often move slowly on procurement and many advertising decisions still rely on human relationships and direct dealmaking. Coghlan said some large companies are already experimenting with thousands of internal AI agents but have not yet worked out how to connect them to media buying, while many of Apostra's early campaigns are running through agencies so brands can test the model without overhauling internal processes.

O'Kelley said the company still expects human judgment and creative control to remain part of advertising, with publishers able to require approval before campaigns run. He also said Apostra expects to seek additional funding between now and the middle of next year.

In our earlier article on enterprise AI agents and cybersecurity, we explained how companies are rapidly deploying software agents that can access files, query databases, send emails, and execute code—creating a new “agent identity” layer that must be governed. We also noted that the emerging security market is splitting into specialized control points such as identity, data access, prompts, network traffic, and auditability as organizations try to monitor and constrain what autonomous agents can do.

This material may contain third-party opinions, none of the data and information on this webpage constitutes investment advice according to our Disclaimer. While we adhere to strict Editorial Integrity, this post may contain references to products from our partners.