Harness² Pricing (2026)
Harness² is free to start. Harness² is an Apache-2.0 research framework from Google Cloud AI Research that automatically refines an LLM agent's harness (prompts, tools, memory, skills and more) for each task and carries lessons forward to future tasks, without changing model weights.
Plans listed by the maker
As published on the Harness² listing. Amounts are shown as written; check the maker's site for taxes, regional pricing and current promotions.
| Starter plan | Open source - $0 - Apache 2.0; model-backed runs incur your own API costs |
How it compares
Across the 7 AI Agents & Automation tools on TechLogHub, 100% offer a free tier and the median published entry price is $0. Harness² is at the category median and has a free tier. Directory-wide, 54% of tools have a free tier and the median entry plan is $14.
Medians come from the TechLogHub pricing report, recomputed daily.
What similar tools charge
Ranked by similarity to Harness² (shared use cases, audience and stack), showing each tool's listed entry point.
| Tool | Free tier | Entry price | Plans |
|---|---|---|---|
| Craft Agents | — | Open Source - Free - Apache 2.0 desktop app; model usage billed by the connected provider (Anthropic, ChatGPT, OpenRouter, local models, etc.) | |
| Harness by Autonomous | $149 | Harness App - Free - open source (MIT), macOS 12+ and Ubuntu 22.04+ · Harness Device - $149 - optional physical controller (scroll, switch panes, voice) · Harness Pro - $299 - optional desk screen showing every agent on every machine | |
| Composio | $0 | Hobby - $0 - 100K tool calls/month, 50K trigger events/month, 3 team members · Pro - $29/month - includes $29 usage credit, unlimited team members, spend controls; overage $0.0003 per tool call · Enterprise - Custom - SSO/SCIM, customer-managed keys, custom SLAs, VPC or self-hosted deployment | |
| Pomerado | $0 | Free - $0/month - 100 tool calls/day, 10 new integrations/month, auto sign-in incl. 2FA · Premium - $50/month - 1,000 tool calls/day, 100 new integrations/month · Business - custom - 100,000+ calls/day, private team integrations, roles, SLA, MCP code ownership | |
| ReefAPI | — | Free tier with 1,000 credits, no card · Paid monthly/quarterly/yearly | |
| Ultracite | — | Open source - Free - MIT license, no paid plans (GitHub Sponsors accepted) |
Harness² pricing FAQ
Quick answers about Harness²'s plans, free tier and billing
Does Harness² have a free plan?
Yes. Harness² lists a free tier. Plans listed by the maker: Open source - $0 - Apache 2.0; model-backed runs incur your own API costs.
How much does Harness² cost?
Harness² starts at $0. The maker lists these plans: Open source - $0 - Apache 2.0; model-backed runs incur your own API costs.
How does Harness² pricing compare with other AI Agents & Automation tools?
Across the 7 AI Agents & Automation tools on TechLogHub, 100% offer a free tier and the median published entry price is $0 per month. Harness² is free to start, below the category median and has a free tier.
What are cheaper alternatives to Harness²?
Craft Agents (free tier), Harness by Autonomous (free tier), Composio (free tier), Pomerado (free tier) are similar AI Agents & Automation tools listed on TechLogHub with a lower or free entry point.
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