Directory / Tessl
Tessl
Verified
Specification-first platform for agent-assisted software development.
Tessl is a product around specification-driven development with coding agents: the spec is the durable artifact, the agent implements against it. It covers intent and some execution, with a narrower scope than a generic IDE.
- Model support
- Multi-model
- Deployment
- Cloud
- Open source
- No
- License
- Proprietary
- Pricing model
- Mixed
- Added / updated
- 19 Aug 2026 / 19 Aug 2026
Assessment
Tessl centers a durable specification as the interface between people and coding agents. The early proprietary product has no independent production metrics in this directory. Evaluate the specification workflow and export path directly.
Strengths
- Spec as the interface to the agent.
- Closer to a factory inbox than an autocomplete plugin.
- Multi-model in current materials.
Limitations
- Closed, early, category still forming.
- No sandbox service.