beacon.sh vs Tessary
beacon.sh and Tessary are both uptime & monitoring tools. beacon.sh is aimed at developers and enterprise, while Tessary is aimed at developers and small businesses. Both have a free plan.
Open-source memory layer that carries lessons across coding agents
Open-source monitoring that finds why production AI agents fail
| Pricing | Open source | Open source |
| Starting price | Not published | Not published |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Built for | Developers, Enterprise, Small businesses | Developers, Small businesses, Enterprise |
| Platforms | macos, windows, linux, web | web, linux |
| Country | US | — |
| Rating | — | — |
Choose beacon.sh if
Developers and engineering teams using several AI coding agents who want shared, reviewed memory and a full record of agent activity.
- MIT-licensed core that runs locally without lock-in to one harness
- One timeline for every agent and machine, including token spend
- Turns repeated walkthroughs into skills every agent can reuse
Look elsewhere if: Teams that only need a shared knowledge store for agents and people, or want to train their own models from traces (Context Engine, Overmind).
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).
beacon.sh vs Tessary pricing
beacon.sh
- Open source$0MIT-licensed local endpoint, JSONL traces, local dashboard
- Beacon Cloud$020+ agents, 50 findings, session search over MCP, daily digest
- Cloud Pro$20/moBilled annually (save 25%); unlimited findings, memories over MCP
- Cloud Team$30/seat/moBilled annually plus $10/mo base, up to 20 seats, shared traces
- EnterpriseCustomApproval gates, SSO, RBAC, audit logs, your own bucket and region
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
beacon.sh · Key features
- Session capture across Claude Code, Cursor, Codex, OpenCode and 20+ other harnesses
- OpenTelemetry-based event model stored as local JSONL by default
- Reviewed memories and skills served to agents over MCP and Agent Skills
- Cloud findings with one-click skills, fix prompts and an evidence trail
- Full session replay with prompts, commands, edits, approvals and tokens
- Terminal trace browser and read-only local dashboard
Cons
- Pro and Team prices are shown only with annual billing
- Team price is listed as $30 per seat in one place and $40 in the comparison table
- Free cloud tier caps findings at 50
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
beacon.sh vs Tessary: FAQ
Do beacon.sh and Tessary have a free plan?
Yes, both beacon.sh and Tessary have a free plan; paid plans add more usage and features.