Cognition buys Poke and TierZero in four days

The AI coding vendors have stopped competing on the model. Cognition — the company behind Devin and Windsurf — closed two acquisitions in four days: TierZero on July 20 and The Interaction Company, makers of Poke, on July 23. Neither one is a model company. One does incident response, the other does personality. That tells you where the AI coding agent fight actually is now.

What actually happened

TierZero built post-deployment automation — early fault detection, incident response, keeping systems stable after the deploy. Per Accel, an investor in the company, it integrates across a company's observability stack, instruments and deploys code, resolves failures, and escalates only when a human is needed. Cognition is folding it into Devin.

Poke is the opposite end of the pipe: an agent that lives in your text messages. TechCrunch reports the deal valued Interaction in the low nine figures. Poke launched in March 2026, has hundreds of thousands of users, and exchanged more than 100 million messages in three months. Cognition CEO Scott Wu on the buy: "The Interaction team has built an agent that people love: it's proactive, it knows you, and it's fun to talk to." Poke co-founder Marvin von Hagen put the thesis plainly — you'd rather have coworkers with personality than coworkers that are just robots. No immediate product changes through 2026; deeper integration is a 2027 question.

Why this matters for your business

Two acquisitions, one strategy: own everything the model touches on the way in and on the way out. Interaction is the input surface — how you talk to the agent. TierZero is the output surface — what happens after the agent's code is running in production. The model in the middle is increasingly the commodity part.

That's a real product insight and it's also a lock-in map. An agent that files your incidents, watches your observability stack, deploys your code, and pings your phone is not a tool you swap out on a Tuesday. It's a platform, and platforms price like platforms once the switching cost is high enough.

The defense isn't avoiding these tools — Devin-class agents genuinely close the loop between writing code and running it. The defense is keeping the substrate yours. Your Git history, your CI config, your observability data, your runbooks: those live in systems you control, in formats that survive a vendor change. Let the agent read them. Don't let the agent be them. We build the same way for clients — the automation is ours to rebuild, the data and the pipeline are theirs to keep.

Sources: Cognition, Cognition, TechCrunch, Accel.