What AI tool do you have in your stack?

At this point in 2026 if you don't have an AI stack, it's hard to imagine how you work. I talk to a lot of founders regularly and one common question i ask out of curiosity: What AI tool do you have in your stack?

And these are the five most common AI tools i keep seeing on early stage founders stack:

1. Superhuman

Even after Grammarly bought Superhuman it is still the fastest way i know to empty an inbox. Shortcuts for triage, reply, and mark as done mean i rarely touch the mouse. That's most of an hour back on a heavy day.

2. Cursor

If you tried Cursor in 2024 and decided it was fancy autocomplete, that opinion is out of date. You describe what you want, it edits across files, runs the tests, reads the errors, and tries again before it shows you anything. Founders and engineers i know run two or three of these at once on different branches. The job has quietly shifted from writing code to reviewing it.

3. Granola

Meetings are where the important stuff gets said and then forgotten. Granola takes the notes so you can look at the person instead of your keyboard. Investor pitches, user interviews, customer calls. I go back to the transcripts more than i expected to.

4. Willow Voice

Most people speak about 3 times faster than they type. Willow turns that gap into finished emails, Slack replies and AI prompts without lifting a finger. Engineers use it for long Claude prompts, which is where the time savings get ridiculous.

5. Linear

Linear used to be where we PMs hangout. Now founders, engineers can hand it an issue and it plans the job, and it can write the code through Claude Code and Codex. Their CEO said issue tracking is dead, which is totally fair.

What's AI tools are on your stack?

PS: I lead growth at Willow and if you use it, would love to hear your feedback.