If you're a startup, the answer is probably "don't pay LaunchDarkly prices." Flagsmith covers roughly 90% of LaunchDarkly's feature set at about 20% of the cost, and PostHog gives you flags for free as part of its analytics free tier.
| Free tier | Paid entry | Self-host | |
|---|---|---|---|
| PostHog | flags included with 1M events/mo | scales with events | yes (open source) |
| Flagsmith | up to 2 seats | $49/mo (3 projects, 10 seats) | yes, no license cost |
| LaunchDarkly | none — 14-day trial | $10/seat/mo (1M client MAU included) | no |
PostHog bundles feature flags with product analytics, session replay, experiments and surveys — if you're already using or considering PostHog for analytics, flags come along at no extra cost, and the 1M-events free tier makes that free for a small product.
Flagsmith is the focused open-source option: hosted at $49/month for a small team, or self-hosted with no license fee (you cover infrastructure). It does targeting, segments, staged rollouts, remote config — the things most teams actually use flags for.
LaunchDarkly is the enterprise standard: the deepest standalone flag-management platform, best-in-class targeting and workflow, extensive integrations — and it's overkill and overpriced for most startups, with no free tier to soften the start.
Small team, want flags with the least fuss: PostHog if you'll use the analytics too, Flagsmith if you want a dedicated tool. Self-hosting to control cost and data: Flagsmith's open-source edition. Large org with complex release governance and the budget to match: LaunchDarkly.