Tessary vs Whiteboard
Tessary and Whiteboard are both developer tools tools. Tessary is aimed at developers and small businesses, while Whiteboard is aimed at developers and enterprise. Both have a free plan.
Open-source monitoring that finds why production AI agents fail
Open-source desktop canvas for reviewing coding agent work
| Pricing | Open source | Open source |
| Starting price | Not published | Not published |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Built for | Developers, Small businesses, Enterprise | Developers, Enterprise, Small businesses |
| Platforms | web, linux | macos, windows, linux |
| Country | — | — |
| Rating | — | — |
Choose Tessary if
Engineering teams running AI agents in production with OpenTelemetry traces who want every trace checked and failures explained.
- Apache 2.0 open source with free self-hosting
- Checks every trace instead of a sampled subset
- RCA links failures to specific commits when a repo is connected
Look elsewhere if: Teams that want a mature, fully supported observability suite or an eval-first workflow (Datadog, Braintrust).
Choose Whiteboard if
Developers who let coding agents write large changes and want a visual, architecture-level way to review them.
- Free and MIT-licensed, runs against local checkouts
- Works with the coding agents teams already use
- Reviews structure and decisions, not only changed lines
Look elsewhere if: Teams that need an editor or a full review workflow with approvals and comments (GitHub, Cursor).
Tessary vs Whiteboard pricing
Tessary
- Open Source$0Self-host with Docker Compose; all core features
- Cloud Free$010k traces/mo, 1 GB, 30-day retention, $10 one-time RCA credit
- PaidCustomCustom classifiers, managed dedicated instance, Slack support
Whiteboard
- Open source$0MIT-licensed desktop app for macOS, Windows and Linux
Tessary · Key features
- Classifiers run on every production trace with no sampling
- Built-in checks for drift, tool errors, secret leaks and malformed output
- LLM triage groups real deviations into trackable cases
- Root-cause analysis over failing traces and your GitHub repository
- OTLP ingestion over HTTP and gRPC with OpenTelemetry gen_ai conventions
- PII redaction before traces are stored
Cons
- Very new project with a short track record
- Paid plan prices are not published
- Frustration classifier requires your own OpenRouter or TypeSafe key
Whiteboard · Key features
- Agent-drawn sequence and entity relationship diagrams linked to code
- AST-aware semantic diff viewer written in Rust
- Pseudocode summaries of long functions and collapsed test changes
- Decision log of agent traces for auditing autonomous choices
- Code OSS base with VS Code keybindings and LSP support
- Automatic MCP setup for Claude Code, Codex, Cursor and OpenCode
Cons
- Beta software; files cannot be edited inside the app
- Reviews spanning several repositories are poorly supported
- Shared reviews do not update and must be re-shared
Tessary vs Whiteboard: FAQ
Do Tessary and Whiteboard have a free plan?
Yes, both Tessary and Whiteboard have a free plan; paid plans add more usage and features.