Tessl
Verified Oct 15, 2026 ActiveAgent enablement platform: a scanned skill registry, security loops on every PR and evals for the coding agents your team runs
Listed on EffectHub ·
Pricing
- Pricing model
- Freemium
- Paid options from
- $100/mo
- Billing
- Monthly
Free is $0 with 1,000 credits a month, a single workspace and no trial cap. Team is $100 per month for 5,000 credits in one workspace with role management, self-serve top-up bundles and spending limits beyond the allowance, no annual commitment. Enterprise is a platform fee plus annual volume-discounted credit bundles with multiple workspaces, SAML SSO, audit logs, BYOK and self-hosted options. Pricing is not per seat.
Use tool ↗About Tessl
Tessl has widened from a skills registry into what it calls an agent enablement platform for the coding agents a team runs. The registry is still the centre: one searchable index across the public catalogue, your organisation and private workspaces, with every skill scanned and scored before installation and visibility into which installed skills agents actually activate. Around it sit loops, such as STRIDE and OWASP-style security checks on every pull request, and before-and-after evals that benchmark model and harness combinations on your own tasks. It works with Claude Code, Cursor, Codex, Copilot and Gemini. Tessl AI Ltd is based in London, founded by Guy Podjarny and backed by Index Ventures, GV, boldstart and Accel. Free gives 1,000 credits a month in one workspace; Team is $100 a month for 5,000 with pay-as-you-go top-ups; Enterprise adds SSO, policy gating and self-hosting.
- Platforms
- Web
- API
- Not confirmed
- Last verified
- Oct 15, 2026
Verified sources
- Free $0 with 1,000 credits a month and a single workspace; Team $100 per month with 5,000 credits, role management, self-serve top-ups and spending limits; Enterprise custom with platform fee, annual credit bundles, multiple workspaces, SAML SSO, audit logs, BYOK and self-hosted options; pricing not per seat (15 October 2026)tessl.io ↗
- Positioned as the agent enablement platform organised into context, loops and factories: skills scanned and scored before installation, STRIDE and OWASP-style checks on every PR, before-and-after evals of model and harness combinations, visibility into installed versus running skills; logos for Claude Code, Cursor, Codex and Antigravity, FAQ also names Copilot and Gemini (15 October 2026)tessl.io ↗
- Footer gives Tessl AI Ltd, 210 Pentonville Road, London, UK; Guy Podjarny listed as Founder and CEO; investors Index Ventures, GV, boldstart and Accel (15 October 2026)tessl.io ↗
Is Tessl legit?
We don’t label tools safe or unsafe. Below are the records we checked ourselves, each with the date we read it.
- TLS certificate
- Issued by Google Trust Services, valid until Nov 19, 2026Seen in our own connection to the site on Oct 15, 2026
- Last checked
- Oct 15, 2026The site answered
- Operated by
- Tessl AI Ltd, United KingdomOur research, card verified Oct 15, 2026
Pros & cons of Tessl
Once a team standardises on coding agents, skills sprawl and nobody knows which ones help or whether any of them are safe. Tessl is the control layer for that: a scanned, versioned registry with evaluation attached, and the distinction between published skills and skills agents actually activate is a genuinely useful metric. The risk is that it governs a convention the ecosystem is still inventing.
Pros
- Security scanning on skills before they reach an agent, which a plain public registry does not do
- Evaluation tells you whether a skill actually helped instead of assuming it did
- Separates skills that are published from skills agents genuinely activate
- Free tier includes 1,000 credits a month and needs no card
Cons
- Credits are the billing unit and the credit-to-work conversion is not published
- Only useful if your team has already standardised on agents like Claude Code, Cursor or Copilot
- $100 a month is a large step from free for a fivefold credit increase
- No founding year, headcount or funding total is published on the site
Best for
- Engineering organisations standardised on Claude Code, Cursor or Copilot at scale
- Platform teams that need policy and security review over agent skills
- Teams who want evidence a skill improves output rather than assuming it does
Not for
- Individual developers, for whom a free public registry is enough
- Teams not yet using agent skills in any organised way
Watch out: This is governance over a fast-moving convention - agent skill formats are still changing, so the value of a registry and its evals depends on the ecosystem staying roughly where it is.
Alternatives to Tessl
Tessl head-to-head
Side-by-side fact sheets against the competitors our research or their makers name — pricing, platforms, API and both verdicts on one page.