beacon.sh vs Flagsmith
beacon.sh and Flagsmith are both developer tools tools. beacon.sh is aimed at developers and enterprise, while Flagsmith is aimed at developers and small businesses. Both have a free plan.
Open-source memory layer that carries lessons across coding agents
Open-source feature flags and A/B tests, cloud or self-hosted
| Pricing | Open source | Open source · $45 |
| Starting price | Not published | $45/mo |
| Free plan | Yes | Yes |
| Free trial | — | 14 days |
| Built for | Developers, Enterprise, Small businesses | Developers, Small businesses, Enterprise |
| Platforms | macos, windows, linux, web | web |
| Country | US | GB |
| 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 Flagsmith if
Engineering teams that want open-source, self-hostable feature flags with optional cloud hosting and built-in experiments.
- Open source under BSD-3-Clause with a real self-hosting path
- Unlimited flags, environments and segments on every plan
- Wide SDK coverage including mobile and Flutter
Look elsewhere if: Teams that want flags bundled with product analytics or a large enterprise vendor ecosystem (PostHog, LaunchDarkly).
beacon.sh vs Flagsmith 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
Flagsmith
- Free$050k requests/mo, 1 team member, 1 project
- Start-Up$45/mo$40/mo billed yearly; 1M requests, 3 members, A/B testing
- Scale-Up$300/mo$250/mo yearly; 5M requests, SAML SSO, roles, audit logs
- EnterpriseCustomPrivate cloud or on-prem, SLA, onboarding, priority 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
Flagsmith · Key features
- Feature flags and remote config with user, segment and percentage targeting
- Bayesian A/B experiments built directly on existing flags
- Scheduled flags, multivariate flags and change requests
- SDKs for JavaScript, React, iOS, Android, Flutter, Python, Go and Rust
- OpenFeature provider for cloud, private cloud and self-hosted setups
- Audit logs, roles and permissions for governance
Cons
- Free cloud plan allows only one team member
- SSO, roles and audit logs require Scale-Up at $250 or more a month
- Experiments v1 supports one primary metric per test
beacon.sh vs Flagsmith: FAQ
Do beacon.sh and Flagsmith have a free plan?
Yes, both beacon.sh and Flagsmith have a free plan; paid plans add more usage and features.