Claude
Customer.io
Mailgun
OpenAI API
PostHog
Sentry
Stripe
SailhouseThe infrastructure you need to build agents anywhere“Their edge infra is key to our ability to have fast edge ingest on our services.”
HostingMaker says so +1 · source ↗
Fly.io
Runs containers as lightweight VMs close to users, in many regions.
Works with AI agents:llms.txtAsk your AI about this, with this page as the source:ChatGPT ↗Claude ↗Perplexity ↗
Fly.io takes a container image of your app and runs it as virtual machines in data centres around the world, on hardware Fly.io operates itself. Requests reach the nearest running copy through a global Anycast network, so an app deployed to several regions answers users from close by.
The building block is the Fly Machine: a fast-starting VM (built on Firecracker) created from your image, with a REST API to create, start, stop and destroy it. A stopped Machine usually boots again in well under a second. Most apps use Fly Launch on top: fly launch scans your project and writes a fly.toml config (plus a Dockerfile for well-supported frameworks), fly deploy ships it, and fly scale changes CPU, RAM, Machine count and regions. Because it runs any Docker image, the language or framework doesn't matter.
What a small team gets: a choice of 17 regions across North America, Europe, Asia-Pacific, South America and Africa; autostop and autostart, so idle Machines stop and wake on the next request; a private WireGuard network between your apps; Fly Volumes for local NVMe storage; and Managed Postgres in most regions.
The trade-off is that you handle more of the reliability yourself. A volume lives on one physical server and attaches to one Machine, Fly.io doesn't replicate data between volumes, and with a single Machine and volume a hardware failure or a deploy means downtime and possible data loss. Fly recommends at least two Machines per app.
Where it fits
How Fly.io itself is built
9 tools, from its own code, website and Product Hunt page.
Who uses it
66 makers' products, each linked to the source that shows it, and 52 open-source projects that declare it in their code.
The maker says so 27Subprocessor list 5Seen on the website 45Declared in code 55How evidence is collected →
SailhouseThe infrastructure you need to build agents anywhere
OpenchangelogThe Changelog for fast shipping teams“Helped us deploy Openchangelog all over the globe for lightning-fast changelog serving worldwide.”
HostingMaker says so +1 · source ↗
InfiniDeskInfiniDesk is a Mac menu bar app that switches between project-specific desktops, each s…“Easy to convert local web application to a live one, with HTTPS.”
HostingMaker says so +1 · source ↗
PinchSOTA real-time voice translation, anywhere“Fly is definitely built for developers - super quick to get up and running!”
HostingMaker says so +1 · source ↗
OboeHigh performance experimentation platform“Fly gives us the global edge deployment we need without the complexity of managing infrastructure across multiple regions. Their platform lets us focus on building Oboe while they handle the networking magic that keeps our experiments blazing fast worldwide.”
HostingMaker says so +1 · source ↗“Kempo is deployed on Fly.io which is extremely developer friendly and has made it so much easier to quickly deploy changes to both staging and production environments.”
HostingMaker says so +1 · source ↗“Deployment is made on Fly. Its such a pleasure to work with! Generous free tier, simple pricing, easy scalability, zero-downtime deployments, and so much more! We've tried Vercel, AWS, and other cloud providers, but Fly.io is where its at!”
HostingMaker says so +1 · source ↗“Easy deploys with straightforward pricing”
HostingMaker says so +1 · source ↗“Fly saved us a lot of time by simplifying the more cumbersome parts of getting an application deployed.”
HostingMaker says so +1 · source ↗
EXPOSEYour no-install & no-config tool to expose local services“EXPOSE uses Fly.io to distribute the service worldwide. The internal network offered by Fly.io is just incredible.”
HostingMaker says so +1 · source ↗
Podlettr—a letter from your podcasts.Read your podcasts in beautiful, weekly newsletters.“Great PaaS for our Rails app, powerful and easy to use. I love the support and the community. Free tier is generous.”
HostingMaker says so +1 · source ↗
RemyAsk any question and get answers from the world’s videos.“Fly has been there for us since day 1”
HostingMaker says so · source ↗
SpeakeasySecurely scale enterprise AI“Gram functions run on Fly.io machines.”
HostingMaker says so · source ↗
WebhoundResearch agents with a depth dial“The simplest way to deploy servers”
HostingMaker says so · source ↗
Cure AIYour companion for evidence-based research.“Fly’s setup process was smooth and intuitive. Hosting APIs globally with minimal configuration was a huge time-saver.”
HostingMaker says so · source ↗
GitHub Wrapped 2025Your GitHub journey with a personalized year in code“Setting up my backend on fly.io was super easy!”
HostingMaker says so · source ↗
PigAutomate Your Windows Computer with AI“Machines on Fly made it easy to build SSL-secured proxies and backends for keeping cross-internet Pig automations safe and encrypted.”
HostingMaker says so · source ↗
FormcraftsThe new generation form builder“Everything else is hosted on Fly machines across the globe”
HostingMaker says so · source ↗“For $15/month, I'm able to decode 15k/sec ADSB messaging, serialize it, and serve to 10,000 concurrent users!”
HostingMaker says so · source ↗
MascotlyLogos are boring, Get a mascot that people actually remember“Shoutout to @flyDev - Deploying Mascotly globally was seamless thanks to Fly.io. It made it super easy to get our backend up and running close to users with minimal config. Fast, reliable, and developer-friendly - couldn’t ask for more! 🚀🌍”
HostingMaker says so · source ↗Open source: a project that declares Fly.io as a dependency in its public code — verifiable, but not necessarily a live product.
What makers say
21 makers on why they use Fly.io, in their own words on Product Hunt.
Fly gives us the global edge deployment we need without the complexity of managing infrastructure across multiple regions. Their platform lets us focus on building Oboe while they handle the networking magic that keeps our experiments blazing fast worldwide.
OboeSep 2026 ↗Shoutout to @flyDev - Deploying Mascotly globally was seamless thanks to Fly.io. It made it super easy to get our backend up and running close to users with minimal config. Fast, reliable, and developer-friendly - couldn’t ask for more! 🚀🌍
MascotlySep 2026 ↗Machines on Fly made it easy to build SSL-secured proxies and backends for keeping cross-internet Pig automations safe and encrypted.
PigSep 2026 ↗Fly’s setup process was smooth and intuitive. Hosting APIs globally with minimal configuration was a huge time-saver.
Cure AISep 2026 ↗For $15/month, I'm able to decode 15k/sec ADSB messaging, serialize it, and serve to 10,000 concurrent users!
Loved and watch-outs
Themes that recur in makers' words and Hacker News comments, each linked to what it summarises, with how Product Hunt tags its reviews.
Most loved
On Product Hunt 5.0★ · 27 reviews
easy deployment 5developer friendly 3CLI 2easy scalability 2free tier 2simple pricing 2
Read the reviews on Product Hunt ↗Reliability and open issues
Incidents on its status page25+ in the last 90 days, 11 major · 25+ in the last year
- minor Delayed ingestion of app logs Oct 2026
- none GRU Networking Issues Sep 2026
- critical Network outage in AMS region Sep 2026
Who switches
Public pull requests on GitHub since Oct 2024 whose title says "X to Y" — real code changes moving a project from one tool to another, by developers in general. Open a row to see the pull requests.
Render → Fly.io15 PRs
- feat(deploy): migrate the API from Render to Fly.io (always-on machine)ninemindai/agentgem · 2026-07-05
- Migrate deployment platform from Render to Fly.ioHoldoff-app/Holdoff · 2026-07-04
- Migrate deployment from Render to Fly.iotimothylee58/Video-Steganograhy-using-LSB-Web-App · 2026-05-23
- feat: migrate backend from Render to Fly.ioezefernandezyf/echolog · 2026-05-22
- Migrate backend deployment from Render to Fly.iotejred213/Pune-Rent · 2026-05-17
- Migrate backend hosting from Render to Fly.iotejred213/StockGenius · 2026-05-17
- Migrate deployment from Render to Fly.ioradithyama/focusr-be · 2026-03-24
- feat(#67): migrate all URLs from Render to Fly.ionicofains1/agentic-ads · 2026-02-27
- Migrate backend from Render to Fly.ioriedel28/hotel-dashboard · 2026-02-16
- 🚀 Migrate from Render to Fly.iomanziosee/community-support-system · 2026-01-28
Railway → Fly.io12 PRs
- chore(docs): correct stale Railway infra references to Fly in agent runbooks + CLAUDEGetCollectRx/Collect-RX · 2026-07-21
- Repoint production API base from dead Railway backend to live Fly.io Braingenewgeorge76/gemini2 · 2026-07-15
- chore(deploy): migrate deployment and configuration from Railway to Fly.iomaru-story/wedding-ecosystem · 2026-07-10
- ops: switch deploy target from Railway to Fly.ioQuantum-Global-Group/sigma · 2026-05-16
- deploy: switch from Railway to Fly.io (Tokyo region)TripAndCode/transit-app · 2026-05-09
- chore: switch deployment target from Railway to Fly.ioChristopher-Crumley/ai-clinical-copilot · 2026-04-28
- fix(#216): update deploy workflow from Railway to fly.iowkliwk/recallth-backend · 2026-04-24
- Migrate from Railway to Fly.io for mTLS supportmyrobotaxi/telemetry · 2026-03-23
- chore: migrate sidecar deploy from Railway to Fly.ioboovines/forward · 2026-03-08
- Migrate deployment from Railway to Fly.ioenboxorg/enbox · 2026-02-16
Vercel → Fly.io11 PRs
- Auction correction Block 7: harden Vercel to Fly reliabilitycarmaziums/carmazium · 2026-09-27
- Block 1: harden Vercel to Fly backend readscarmaziums/carmazium · 2026-09-25
- Migrate Vercel runtime to Fly.io, Cloudflare, and Xatafratercem-design/cultcodex-v2 · 2026-09-15
- Migrate off Vercel to Fly.io (Django gunicorn, Mumbai)samy123-cmd/career-reality · 2026-08-06
- Switch production deployment from Vercel to Fly.io container runtimekhamanihendrix1-sys/meridian-signal-service · 2026-06-27
- Move from vercel to flysnide/davesnider.com · 2026-06-02
- Remove Vercel serverless API; route everything to Fly backendpolluxchou/15signals · 2026-05-22
- Migrate all apps from Vercel to Fly.io for persistent VM supportCamJohnson26/agent-first-fizzbuzz-scalable · 2026-04-19
- Configure Vercel frontend to use Fly API base URLMrMiless44/Infamous-freight · 2025-12-24
- Migrate host from Vercel to FlySiege-Perilous/tableslayer · 2024-12-19
Cloudflare → Fly.io6 PRs
- Move CMEM Pro sync hub off Cloudflare to Fly + Neonthedotmack/claude-mem · 2026-09-26
- Cloudflare: asterism.quietlife.net CNAME to Fly.iocwage/homelab · 2026-08-12
- fix(entry): bypass wallet gate for dev players + route Cloudflare to FlyKudbeeZero/FRONTIERNeXt · 2026-06-26
- deploy: wire frontend to Cloudflare Pages and API gateway to Fly.io backendTrancendos/Tranc3 · 2026-06-25
- Migrate from Cloudflare to Fly.io with SQLiteadrianmoses/habla-practice · 2026-04-07
- Cloudflare to fly.ioairandember/programprimitives · 2025-12-20
Amazon Web Services → Fly.io4 PRs
- Migrate production from AWS ECS to Fly.ioJamesTwisleton/ai-persona-app · 2026-04-15
- updates to aws to fly migration docsuperfly/docs · 2025-08-14
- add header image for AWS to Fly guidesuperfly/docs · 2025-06-10
- add AWS to Fly overview guidesuperfly/docs · 2025-06-09
Fly.io → Render21 PRs
- docs: swap API hosting from Fly.io to Render in specvindon/rag-portfolio · 2026-09-07
- Switch production deploy from Fly.io to Render.comMatheusCavalari/kanvas · 2026-08-12
- Switch deploy target from Fly.io to Render (no credit card required)misbahtechhola/esignVaidation · 2026-08-08
- feat: migrate sandbox to Fly.io, move backend to Render, standardize …jerryjuche/koder · 2026-07-31
- Remove fly.toml, deploy target moved to Renderjoythejaks/palmyield · 2026-07-21
- Deploy: add Fly.io config as an alternative to Renderrakeshnetdev/AIEC01_CERT_CHLG_GRANDMATE · 2026-07-20
- Switch backend deploy target from Fly.io to RenderIqbalAzhari24/Sign-language-translator · 2026-07-13
- feat: migrate production from Fly.io to Render + Cloudflare Pages + Neonsano-suguru/slicefx-shortlink · 2026-07-12
- chore: migrate deployment target from Fly.io to Rendermasonnguyen1243/heno-shopify · 2026-07-07
- Switch authoritative-server hosting from Fly.io to Rendershavei/NEON-SURVIVOR · 2026-06-24
Fly.io → Railway15 PRs
- Cut over the public A2A gate from Fly to Railwaydlescanogithub/argentine-a2a · 2026-10-01
- feat(infra): migrate cloud production from Fly.io to Railwaykennygeiler/DeployAI · 2026-08-11
- Cut over marrow from Fly to Railway (CI smoke + docs)F0rge/f0rge · 2026-08-02
- Switch deployment from Fly.io to Railwayhedde-whatever/lumen · 2026-06-08
- fix: update API URL from fly.dev to Railwaymarcelrezkova/CarValueEngine · 2026-05-26
- chore(deploy): switch from Fly.io to Railway + tsx runtimedropdowner1/dropdowner1.github.io · 2026-05-19
- chore(deploy): migrate server from Fly.io to Railwayashlrai/ashlr-plugin · 2026-05-01
- Migrate backend from Fly.io to Railway; harden CORS parsingjonx0037/multimodal-financial-rag · 2026-04-18
- Move from Fly to Railway, and mongo to sqlitenoisebridge/nb.wtf · 2026-04-13
- chore(infra): migrate backend deployment from Fly.io to RailwayRatioraji/wiki-generator · 2026-03-23
Fly.io → Cloudflare10 PRs
- Move hosting from fly.io to Cloudflare Pages with daily static rebuildsAkseliManninen/lunssi · 2026-09-17
- fix(security): lock the Fly origin to Cloudflare with a shared-secret headerwilldoucet/todo-app · 2026-09-11
- docs: specify Fly.io to Cloudflare migrationmohammedzamakhan/epic-startup · 2026-08-20
- feat(cms): migrate CMS from Fly.io and MongoDB to Cloudflare Workers with D1 and R2mohammedzamakhan/epic-startup · 2026-08-18
- Migrate Fly URLs to the Cloudflare jobs Worker (ZIP download + Google Drive transfer)regev-ima/imagick_ai · 2026-07-20
- Migrate from Fly.io to Cloudflare Workersakan72/xyz · 2026-05-10
- Switch CI/CD from Fly.io to Cloudflare Workersthevedantmodi/boxtrack · 2026-04-27
- feat(infra-fly): declare api deployment to fly.io with cloudflare front-back splitIshou/wordsparrow · 2026-04-25
- feat(server): migrate signaling server from Deno/Fly.io to Cloudflare Workersisolonenko/ash · 2026-03-14
- feat(web): migrate from Fly.io to Cloudflare Workerstechtalkjp/hyperlocal · 2026-02-25
Fly.io → Vercel7 PRs
- Migrate JeremyOS from Fly to Vercel (KV + Blob)jeremyPharmer/jeremyOS · 2026-08-31
- infrastructure(vb-manager-next-mobile): Migrate deployment from Fly.io to Verceliamharryliu/vigilant-broccoli · 2026-08-19
- chore: deploy the backend to Fly.io and the frontend to Vercel (PET-53)AntePrkacin/personal-expense-tracker · 2026-08-04
- Migrate hosting from Fly.io to VercelHelloImFranky/trusty_algebra_tutor · 2026-07-11
- Deploy backend to Fly.io and frontend to Vercel (#100)jonathanstelman/indy-explorer · 2026-05-24
- feat: Redirect fly.dev traffic to Vercel domaingabrieltan0506-prog/mvstudiopro · 2026-05-16
- Deploys to Fly.io but images not linking due to vercel adapterplayfulprogramming/playfulprogramming · 2024-12-03
Fly.io → Amazon Web Services6 PRs
- Move ingestion-time embedding off Fly's throttled shared CPU to AWS Batchkpedneka/dumpster · 2026-09-05
- Cut PR previews over from Fly to AWSdistrictr/districtr-v2 · 2026-07-22
- Fix CORS + migrate API deploy from Fly.io to AWS LambdaArdenoStudio/sri-lanka-property-price-intelligence-platform · 2026-07-13
- Migrate backend from Fly.io to AWS ECS Fargate + RDSArdenoStudio/octane · 2026-07-12
- feat(root): migrate deploys from Fly.io to AWS ECS FargateIEFA-FAB/IEFA · 2026-07-03
- docs: update Fly Machines references to AWS EC2 + Railway (Apr 2026 migration)Molecule-AI/docs · 2026-05-04
Alternatives to Fly.io
All alternatives by situation →RailwayServers, workers and databases deployed together, with almost no configuration.Compare with Fly.io →Amazon Web ServicesThe widest catalog of building blocks — Lambda, containers, managed databases, queues — to assemble your own infrastructure.Compare with Fly.io →
Hetzner Cloud
Netlify
Coolify
SSTQuestions makers ask about Fly.io
What does the free trial include, and what happens when it ends?
The trial gives 2 hours of total Machine runtime or 7 days, whichever comes first, with up to 10 Machines; trial Machines stop automatically after 5 minutes of running. When it runs out, your apps stop until you add a payment method. source ↗
Which regions can I deploy to?
17 regions, including several in the US, Toronto, São Paulo, Amsterdam, Frankfurt, London, Paris, Stockholm, Johannesburg, Tokyo, Singapore and Sydney. Machines and volumes stay in the region they were created in, and Managed Postgres is available in most but not all regions. source ↗
Can my app scale to zero when nobody is using it?
Yes. With autostop and autostart in fly.toml, the Fly Proxy stops or suspends idle Machines and starts them again when requests arrive. You aren't charged for the CPU and RAM of stopped Machines. source ↗
Is a Fly Volume safe for my database?
Only with care. A volume is a slice of an NVMe drive on one server, attached to one Machine, with no automatic replication; Fly takes daily snapshots (kept 5 days by default) but says they shouldn't be your main backup. Run at least two Machines with volumes and replicate the data yourself, or use Managed Postgres. source ↗
Do I need Docker or a Dockerfile to deploy?
Fly runs container images, but fly launch can scan your source and produce a Dockerfile for frameworks it knows well; otherwise point it at your own Dockerfile or a prebuilt image. source ↗
Is Fly.io SOC 2 compliant, and will it sign a HIPAA BAA?
Fly.io is SOC 2 Type 2 audited and will sign BAAs for healthcare apps. Apps run in Firecracker VMs with no shared kernel, and traffic between hosts goes over WireGuard. source ↗
Is Fly.io free?
No permanent free tier; paid use starts at $1.94/mo (shared-cpu-1x). source ↗
Is Fly.io open source or self-hostable?
Not open source, and hosted only.
Can AI coding agents work with Fly.io?
It serves an llms.txt docs index.
Who uses Fly.io?
66 makers' products we track, each with a source, and 52 open-source projects declare it in their code. source ↗