micro1 started as an AI recruiting company, and its AI interviewer, Zara, was popular with teams interviewing engineers and contractors. In 2026 micro1 switched its focus to AI training data (the data used to teach AI systems), and Zara is no longer offered as a hiring product. If you relied on it, these tools do the same job.
Facts last checked 24 September 2026 · Published by the LessRounds team
micro1 (Zara)
micro1 began as an AI recruiting startup with an AI interviewer called Zara. It has since become an AI training-data company.
Its Zara pages now point to the AI data business (TechCrunch, 20 August 2026).
At a glance
| Tool | How it interviews | AI interviewer | Free to try | Sign up on your own |
|---|---|---|---|---|
| LessRounds | Live AI interview (voice or video) | Yes. It can ask its own follow-up questions, or read your questions word for word | 100 free credits when you sign up (about 20 interviews). They don’t expire | Yes. Sign up with an email code |
| Ribbon | Live AI interview (voice or video) | Yes. Its questions adapt to each answer | 7-day trial | Yes |
| Interviewer.AI | Recorded video + AI avatar | Yes, on the Professional plan and above | 14-day trial | Yes |
| HeyMilo | Live AI interview (voice, video, SMS) | Yes | None published | No. You start with their sales team |
01
The closest replacement you can set up on your own: an AI interviewer you share by link, which scores candidates on the skills you choose. LessRounds starts you with 100 free credits (about 20 interviews), then costs $5 per finished interview of up to 30 minutes.
Where it’s strong
Trade-offs
02
AI interviews that adapt to each answer, with published plans and applicant tracking system connections.
Where it’s strong
Trade-offs
03
You can sign up on your own. Its AI avatar, which holds a conversation, is on the Professional plan.
Where it’s strong
Trade-offs
04
An AI recruiter for teams hiring in large numbers, sold through a sales team.
Where it’s strong
Trade-offs
How to choose
micro1 now focuses on AI training data. Its Zara interviewer pages point to that business. If you have an existing agreement, check with micro1 directly.
Yes, for a first interview. It can cover communication, experience and how candidates think through problems. It doesn’t run live coding tests.
Start with 100 free credits, enough for about 20 interviews. No credit card or sales call needed.