Envelope
Design complete AI agent specs — roles, skills, tools, and handoffs — in plain language, ready to export.
How the 6.6 was reached
- Quality of output4/10
Only vendor description of open JSON schema export; no independent evidence of agent design quality. openenvelope.org
- Ease of use9/10
Free to design with no account needed to start; schema docs available. openenvelope.org
- Pricing value8/10
Free plan forever, Pro $9 and Team $39 per month, both free in beta. openenvelope.org
- API and integration quality7/10
Open JSON schema, MCP endpoint and REST API on Pro plan; GitHub publish on Team. openenvelope.org
- Solves the problem it claims to solve5/10
Only vendor descriptions of agent design features; no independent evidence it delivers. openenvelope.org
6.6/10 is the mean of the 5 criteria that apply. Scored on the five-criteria rubric v1, 29 September 2026. How scoring works
Pricing
- Basic agent design
- Export spec
- Limited workflows
- Unlimited agent designs
- Team sharing
- Priority support
- Advanced export options
Key Features
- Plain-language workflow description to full agent spec
- Sub-agent structure with roles, skills, models, and tools
- Reporting lines and handoff logic design
- Human-in-the-loop approval gate specification
- Open schema export compatible with Git and engineering handoff
- Integrations with 500+ tools including Slack, HubSpot, Notion, Stripe, and Jira
Pros & Cons
Pros
- Produces a structured, shareable spec — not a wall of text
- Free to start with no blank-page barrier (enter your URL for department-level suggestions)
- Open schema means no lock-in; hand directly to engineers
- Surfaces tool credentials and API access requirements upfront
Cons
- Spec-only output — still requires engineers or a separate platform to actually build and run agents
- Pricing tiers not publicly detailed beyond 'free to start'
- Younger product with limited community or integration ecosystem compared to established orchestration tools
- No built-in execution or testing environment to validate the designed spec
Envelope fills a real gap: most teams jump straight to building AI agents and discover coordination gaps late. By forcing a structured design phase — roles, tools, handoffs, approval gates — it shortens the engineering brief and reduces scope creep. It's a planning tool, not a builder, so its value depends on whether your team actually iterates on specs before coding.
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