Staxly

GrowthBook vs Fastly

Open-source feature flags + experimentation — Warehouse Native
vs. Edge cloud platform — CDN + compute + security + observability

GrowthBook website ↗Fastly website ↗

Pricing tiers

GrowthBook

Open Source (Self-Host)
MIT-licensed. Unlimited everything. Community support.
$0 base (usage-based)
Cloud — Starter (Free)
Up to 3 users. Unlimited flags + experiments. Warehouse Native included.
Free
Cloud — Pro
$40/user/month. Up to 50 users. Advanced stats, visual A/B editor, CUPED, sequential testing, bandits.
$40/mo
Cloud — Enterprise
Custom. Unlimited users, SSO/SAML, approval flows, data pipelines, exportable audit logs.
Custom
Self-Host Enterprise
Open Source + Enterprise license. Visual A/B editor, advanced metrics, SSO/SAML, approvals, training.
Custom
GrowthBook website ↗

Fastly

Free Trial
Free allowances: 100 GB bandwidth, 1M CDN requests, 10M Edge Compute requests, 100M vCPU-ms, 500K DDoS requests.
Free
Pay-as-you-go
Usage-based rates with volume discounts. No minimum commitment.
$0 base (usage-based)
Basic Package
$1,500/month. 100M requests. Standard support.
$1500/mo
Starter Package
$6,000/month. 500M requests. Gold support.
$6000/mo
Advantage
Custom. 2B requests. Gold support.
Custom
Ultimate
Custom. 5B+ requests. Enterprise support.
Custom
Fastly website ↗

Free-tier quotas head-to-head

Comparing oss on GrowthBook vs free on Fastly.

MetricGrowthBookFastly
No overlapping quota metrics for these tiers.

Features

GrowthBook · 15 features

  • Approval Flows — Require reviewer approval on flag changes. Enterprise.
  • Audit Logs — Full change history. Exportable on Enterprise.
  • Dimensions & Slicing — Break down experiment results by user dimensions.
  • Edge SDK Support — Cloudflare Workers, Lambda@Edge, Fastly, Akamai EdgeWorkers, Netlify Edge.
  • Experiments — A/B/n with CUPED variance reduction + sequential testing.
  • Feature Flags — Boolean + string + number + JSON flags with targeting.
  • Feature Reviews (PR-style) — Draft → review → approve flag changes.
  • Guardrail Metrics — Auto-monitor key metrics during experiments.
  • Metric Catalog — Define + reuse metrics across experiments.
  • Multi-Armed Bandits — Adaptive traffic allocation. Pro+.
  • Safe Rollouts — Guarded gradual rollouts with automatic rollback.
  • SSO / SAML — Enterprise SSO for cloud + self-host EE.
  • Sticky Bucketing — User stays in variant even after eligibility changes.
  • Visual A/B Test Editor — No-code DOM editor for web experiments. Pro+.
  • Warehouse Native — Connect your warehouse + run experiments against your events data.

Fastly · 16 features

  • API Security — Schema validation + rate limiting.
  • Bot Management — Behavioral bot detection + mitigation.
  • CDN — Global Varnish-based CDN with VCL customization.
  • Compute@Edge — Wasm-based serverless at 200+ POPs. Rust, JS, Go.
  • DDoS Protection — Included on all plans.
  • Fanout (WebSockets) — Persistent connection fan-out at edge.
  • Image Optimization — On-the-fly resize/format/quality.
  • Instant Purge — <150ms global cache invalidation.
  • KV Store (Config) — Edge key-value store for config.
  • Live Streaming — HLS + DASH live video delivery.
  • Log Streaming — Real-time logs to S3, Datadog, Splunk, Azure, GCS, Kafka.
  • Managed TLS — Automated cert issuance + renewal.
  • Next-Gen WAF — Signal Sciences acquired — runtime app protection.
  • Real-Time Analytics — Sub-second log streaming + metrics.
  • Secret Store — Encrypted secrets at edge.
  • Shield POP — Origin shield to reduce origin load.

Developer interfaces

KindGrowthBookFastly
CLI—Fastly CLI
SDKEdge SDKs (CF Workers / Lambda@Edge / Fastly / Akamai), growthbook-android, growthbook-flutter, growthbook-go, growthbook-java, growthbook-node, growthbook-php, growthbook-python, growthbook-ruby, growthbook-swift, sdk-javascript, sdk-reactcompute-go-starter, compute-js-starter, compute-rust-starter
RESTGrowthBook REST APIFastly API
OTHERWebhooksCompute@Edge (Wasm), VCL (Varnish)
Staxly is an independent catalog of developer platforms. Outbound links to GrowthBook and Fastly are plain references to their official websites. Pricing is verified against vendor pages at publication time — reconfirm before buying.

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