
What they do:
Test, monitor, and improve your voice agents
Quick facts:
HQ: San Francisco, CA, United States
This list has 392 startups and was last updated on Oct 15, 2026. 85 of them are hiring right now. Biggest hubs: San Francisco (193), New York (56), and London (18). Largest teams: Fivetran, Amplitude, and Nabis. Latest round: Safi Analytics raised $22.4M (Oct 14, 2026).
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What they do:
Test, monitor, and improve your voice agents
Quick facts:
HQ: San Francisco, CA, United States

What they do:
Understand your users beyond the numbers
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HQ: San Francisco, CA, United States

What they do:
Building medical school for AI Agents
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HQ: San Francisco, CA, United States

What they do:
Digital transformation for real economy businesses
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HQ: San Francisco, CA, United States

What they do:
Expressive conversational AI
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HQ: San Francisco, CA, United States

What they do:
Evals, RL environments and training data for creative tasks
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HQ: San Francisco, CA, United States

What they do:
Evals for humans
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HQ: San Francisco, CA, United States

What they do:
Reliable and safe data engineering and data science agents
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HQ: San Francisco, CA, United States

What they do:
Internal industrial company data for frontier labs
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HQ: San Francisco, CA, United States

What they do:
RL post-training for science reasoning and performance engineering
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HQ: San Francisco, CA, United States

What they do:
An AI-operated logistics company.
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HQ: San Francisco, CA, United States

What they do:
Easy button to use data for your daily operations
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HQ: San Francisco, CA, United States

What they do:
The unbiased AI and data layer for skin health.
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HQ: London, United Kingdom

What they do:
Open-source monitoring for machine learning models
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HQ: London, United Kingdom

What they do:
AI agents to build B2B datasets
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HQ: San Francisco, CA, United States

What they do:
Payments & analytics for apps in the OpenAI GPT Store
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What they do:
ML Marketing Infrastructure
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HQ: Singapore

What they do:
The safety layer between AI agents and your database
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What they do:
Cloud Native SIEM (alternative to Splunk/Elastic)
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HQ: Seattle, WA, United States

What they do:
AI Teammates for Data Tasks
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HQ: San Francisco, CA, United States

What they do:
Build chat-with-data agents for customer-facing applications
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HQ: Limerick, Ireland

What they do:
No Code Data Analysis for Life Science Research
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HQ: London, United Kingdom

What they do:
Win local search on ChatGPT & other LLMs
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HQ: San Francisco, CA, United States

What they do:
Open source agentic BI for founders
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HQ: San Francisco, CA, United States

What they do:
Datadog for robots
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HQ: San Francisco, CA, United States

What they do:
Robotic Training Data at Scale
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HQ: Boston, MA, United States

What they do:
Build full-stack applications for business operations with AI
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HQ: New York, NY, United States

What they do:
AI formulas and document support for Microsoft Excel
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HQ: New York, NY, United States

What they do:
The agentic AI Word editor
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HQ: San Francisco, CA, United States

What they do:
Outbound Sequencing Infrastructure for Startups
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HQ: San Francisco, CA, United States

What they do:
Headless Data Team
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HQ: San Francisco, CA, United States

What they do:
We turn complex API integrations into drop‑in full‑stack libraries
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HQ: Amsterdam, Netherlands

What they do:
AI Employees for Hotels
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HQ: San Francisco, CA, United States

What they do:
Let your agent build dashboards and reporting.
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HQ: San Francisco, CA, United States

What they do:
Building reinforcement learning environments
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HQ: San Francisco, CA, United States

What they do:
AI + human review to solve data cleaning - accessible via API or Excel
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HQ: New York, NY, United States