Flagsmith Alternative: Why Teams Switch to Rollgate

Originally published on rollgate.io.

Why Teams Look for a Flagsmith Alternative

Flagsmith earned its reputation the honest way. The core is open source under a BSD-3-Clause license, the self-hosted version starts with a single docker-compose command, and the cloud product covers boolean flags, multivariate testing, and remote config without drama.

The teams searching for a Flagsmith alternative usually hit one of three walls:

1. The cloud free tier is tight: 50K requests per month, 1 team member, 1 project
2. Real-time flag updates require an Enterprise subscription
3. Self-hosting is free in license cost but not in engineer-hours

None of these is a scandal. They are pricing and packaging decisions, and Flagsmith is transparent about them. Whether they matter depends on how you use feature flags: a solo developer polling every few minutes will not notice, while a team that wants a kill switch to propagate in seconds will notice immediately.

Flagsmith vs Rollgate: Feature-by-Feature Comparison

Feature	Rollgate	Flagsmith
Flag types	Boolean, string, number, JSON	Boolean, multivariate, remote config
Targeting rules	18 operators, segments, percentage	Segments, identities, percentage
Scheduled changes	Yes (all paid plans)	Yes (Start-Up and above)
1-click rollback	Yes (last 20 changes)	Yes (Feature Versioning v2, opt-in per env)
Real-time updates	SSE streaming, every plan	SSE on Enterprise only
SDKs	12 official	15+ official
Circuit breaker	Built into all SDKs	Not included
Open source	No (self-hosted version planned)	Yes, BSD-3-Clause
Free tier	500K req/mo, 3 projects, 3 members	50K req/mo, 1 project, 1 member
EU hosting	Yes (Germany, single region)	Yes (multi-region, EU available)

Flagsmith genuinely wins on open source and raw SDK count. The differences that push teams to switch concentrate in three places: the free tier, how flag changes reach your application, and what the SDKs do when the network misbehaves.

The Free Tier Gap: 50K vs 500K Requests

Run the numbers on Flagsmith's 50K monthly requests. A single browser client polling every 60 seconds generates about 43K requests per month. One moderately visited production app exhausts the free tier on its own, before you add a staging environment or a second service. The single team member limit compounds this.

Rollgate's free tier is designed to run real workloads: 500K requests per month, unlimited flags, 3 projects, 3 environments, 3 team members, and real-time SSE included. Because SSE replaces most polling, those 500K requests stretch much further than the raw 10x multiplier suggests.

Flagsmith does beat Rollgate on one free tier axis: environments are unlimited on every Flagsmith plan, while Rollgate's free tier caps them at 3.

Real-Time Updates: Push vs Poke

Flagsmith reserves real-time updates for Enterprise, and the mechanism is a notification, not a delivery. Per the Flagsmith real-time docs, the SSE stream sends a message containing the environment's last update timestamp. Your application compares it with its cache and, if stale, makes a second request to fetch the actual flags. Two hops between "someone toggled the flag" and "your code sees the new value".

Rollgate's SSE stream carries the flag rules themselves. When a flag changes, connected SDKs receive the full updated rule set in the event payload and re-evaluate locally. One hop, no re-fetch cycle, and it works on every plan including the free one:

import { RollgateClient } from '@rollgate/sdk-node';

const client = new RollgateClient({
  apiKey: process.env.ROLLGATE_SERVER_KEY,
  enableStreaming: true,
});

await client.initialize();

// Evaluated locally against the streamed rule set
const useNewCheckout = client.isEnabled('new-checkout', false, {
  id: user.id,
  attributes: { plan: user.plan },
});

For gradual rollouts this is a convenience. For kill switches it is the whole point: when checkout breaks at 3am, the flag flip reaches every connected SDK in seconds, without waiting for a poll interval or paying for an Enterprise contract.

Every Rollgate SDK also ships with a circuit breaker, retry with exponential backoff, and a local cache that serves the last known flag values if the API becomes unreachable.

Self-Hosting: Where Flagsmith Genuinely Wins

If running the flag service on your own infrastructure is a hard requirement, use Flagsmith. It is the stronger option today.

The open source deployment is real, not a crippled demo: flags, segments, multivariate testing, and 15+ SDKs work self-hosted, with 6,500+ GitHub stars and years of production use behind them.

The honest counterweight is operational cost. Self-hosting means owning a Python + PostgreSQL stack: provisioning, backups, monitoring, security patching, and upgrades. Flagsmith has shipped over 500 releases, which is excellent maintenance velocity and also a treadmill you now walk on. For a team whose actual requirement is EU data residency rather than physical ownership, a managed EU service gets there without the ops budget: Rollgate runs entirely in Germany, single region.

Pricing: Flagsmith vs Rollgate

Plan tier	Flagsmith	Rollgate
Free	50K req/mo, 1 seat, 1 project	500K req/mo, 3 seats, 3 projects
Entry	Start-Up $40-45/mo, 1M req, 3 seats	Starter €39-45/mo, 1M req, 5 seats
Mid	Scale-Up $250-300/mo, 5M req, RBAC, audit	Pro €99-119/mo, 3M req, RBAC
Top	Enterprise (custom), real-time updates	Growth €299-349/mo, 12M req, 99.9% SLA

Disclaimer: competitor pricing changes frequently. Check flagsmith.com/pricing for current rates.

At the entry level the two are priced almost identically. The gap opens at the governance tier: roles, permissions, change requests, and audit logs arrive at $250/month on Flagsmith Scale-Up. Rollgate includes RBAC at €99/month on Pro. Real-time updates widen it further.

Migration from Flagsmith to Rollgate

Most small codebases migrate in 1-2 days:

1. Audit your Flagsmith flags. In practice 20-40% of long-lived flags turn out to be stale and can be deleted instead of migrated.
2. Recreate flags in Rollgate. Boolean flags map directly, remote config values map to string/number/JSON flags, multivariate weightings map to percentage-based variant distribution.
3. Swap the SDK (flagsmith-nodejs → @rollgate/sdk-node, flagsmith → @rollgate/sdk-browser, and so on).
4. Validate with parallel running. Evaluate flags from both services for a few days, log discrepancies, then remove the Flagsmith SDK.

The structural difference: Flagsmith fetches evaluated flags per identity, while Rollgate evaluates locally against rules kept current over SSE, so per-user evaluation does not cost an API round trip.

When to Switch (and When to Stay)

Switch to Rollgate if your production traffic outgrew 50K free requests, you want real-time delivery without an Enterprise contract, you need SDKs that degrade gracefully, or single-region EU processing simplifies your GDPR story.

Stay with Flagsmith if self-hosting is a hard requirement, you are already running the open source deployment happily, or you depend on an SDK platform Rollgate does not cover yet.

For the full comparison, including the FAQ and the detailed migration code, read the original article on rollgate.io.