{"slug":"fly-io","name":"Fly.io","domain":"fly.io","verdict":"As of 2026-08-08, ChatGPT, Claude, Gemini collectively rank Fly.io first for paas platforms for hosting elixir phoenix applications (one of 7 leaderboards it appears on). Source: https://modelsagree.com/product/fly-io (modelsagree.com, CC BY 4.0).","best_rank":1,"categories":7,"entries":[{"slug":"best-paas-platforms-for-hosting-elixir-phoenix-applications","title":"Best PaaS platforms for hosting Elixir Phoenix applications","rank":1,"of":7,"score":14,"appearances":3,"modelRanks":{"ChatGPT":2,"Claude":1,"Gemini":1},"reason":"The closest thing to a Phoenix-native PaaS — first-class support for BEAM clustering (libcluster works out of the box via internal 6PN networking), global multi-region deploys that pair naturally with Phoenix LiveView and Fly.Postgres, and a documented partnership with the Phoenix core team (Chris McCord's official deploy guides target it). Fly Machines give fast-booting Firecracker VMs and easy horizontal scaling of distributed nodes. FIX: Operationally rawer than a fully-managed PaaS — you own more of the reliability story (past platform-wide outages, self-managed Postgres unless you pay for managed), so it's not for teams wanting hands-off stability.","reasons":[{"model":"Claude","reason":"The closest thing to a Phoenix-native PaaS — first-class support for BEAM clustering (libcluster works out of the box via internal 6PN networking), global multi-region deploys that pair naturally with Phoenix LiveView and Fly.Postgres, and a documented partnership with the Phoenix core team (Chris McCord's official deploy guides target it). Fly Machines give fast-booting Firecracker VMs and easy horizontal scaling of distributed nodes. FIX: Operationally rawer than a fully-managed PaaS — you own more of the reliability story (past platform-wide outages, self-managed Postgres unless you pay for managed), so it's not for teams wanting hands-off stability."},{"model":"Gemini","reason":"Treats Elixir and Phoenix as first-class citizens (with Phoenix creators on staff), offering native BEAM node clustering via internal WireGuard mesh networking, ultra-low latency multi-region deployment essential for Phoenix LiveView WebSockets, and out-of-the-box phoenixliveview integration. Takes the top spot over Gigalixir due to global edge routing capabilities. (Assumes low-latency WebSocket performance and multi-region scalability are primary goals)."},{"model":"ChatGPT","reason":"Excellent Phoenix automation, first-class distributed Erlang over private networking, global Anycast routing, broad regional coverage, granular Machines pricing, and strong remote-console tooling; it nearly ties Gigalixir and wins for multi-region LiveView."}],"fixes":[{"model":"ChatGPT","fix":"It exposes more infrastructure complexity, especially around production PostgreSQL and multi-region data architecture."},{"model":"Gemini","fix":"Platform infrastructure blips and changing billing structures make it less suitable for enterprise teams requiring legacy SLA guarantees and rigid, flat-rate monthly pricing."}],"updated":"2026-08-08","rank_history":{"days":["2026-08-03","2026-08-08"],"ranks":[1,2]},"api":"https://modelsagree.com/api/v1/best/best-paas-platforms-for-hosting-elixir-phoenix-applications.json"},{"slug":"best-container-hosting-platform-for-backends","title":"Best container hosting platform for backends","rank":2,"of":7,"score":13,"appearances":4,"modelRanks":{"ChatGPT":3,"Claude":2,"Gemini":2,"Grok":4},"reason":"Firecracker microVMs deployed close to users in 30+ regions, real support for TCP/UDP, WebSockets, and persistent volumes — the most capable option when a backend needs low latency, raw protocols, or hardware-adjacent control while keeping a simple flyctl deploy flow.","reasons":[{"model":"Claude","reason":"Firecracker microVMs deployed close to users in 30+ regions, real support for TCP/UDP, WebSockets, and persistent volumes — the most capable option when a backend needs low latency, raw protocols, or hardware-adjacent control while keeping a simple flyctl deploy flow."},{"model":"Gemini","reason":"Exceptional for low-latency, globally distributed backends. It compiles containers to MicroVMs deployed at the edge near users, offering built-in Anycast routing, private IPv6 mesh networking, and first-class support for running stateful databases close to application instances."},{"model":"ChatGPT","reason":"Runs containers close to users across many regions with low-cost Machines, private networking, persistent volumes, and unusually flexible process and scaling controls"},{"model":"Grok","reason":"Strong edge/global container deployment with Firecracker microVMs, multi-region primitives, and low-latency focus; Docker-native and cost-effective for distributed backends where proximity matters."}],"fixes":[{"model":"ChatGPT","fix":"Its VM-like primitives and region-local storage demand more operational judgment than a conventional PaaS"},{"model":"Claude","fix":"A history of platform incidents and thinner managed-database/support story means you carry more operational vigilance than the \"just works\" PaaS tier; not for teams that want to never think about infrastructure."},{"model":"Gemini","fix":"Historically prone to networking and platform stability issues, and lacks managed database offerings, forcing developers to self-manage databases or use third-party services."}],"updated":"2026-07-15","rank_history":{"days":["2026-06-29","2026-06-30","2026-07-08","2026-07-09","2026-07-10","2026-07-14","2026-07-15"],"ranks":[2,2,3,1,4,3,2]},"reasoning_shift":[{"model":"Gemini","from":"2026-07-14","to":"2026-07-15","added":[{"t":"built-in Anycast routing","q":"built-in Anycast routing"},{"t":"lacks managed database offerings","q":"lacks managed database offerings"},{"t":"developers must self-manage databases","q":"forcing developers to self-manage databases or use third-party services"}],"dropped":[{"t":"exceptional git-driven CLI workflow","q":"exceptional git-driven CLI workflow"},{"t":"built-in WireGuard private networking","q":"built-in WireGuard private networking"},{"t":"persistent storage volume migrations remain complex","q":"persistent storage volume migrations remain complex"}]},{"model":"ChatGPT","from":"2026-07-14","to":"2026-07-15","added":[{"t":"flexible process and scaling controls","q":"unusually flexible process and scaling controls"}],"dropped":[{"t":"inexpensive bandwidth","q":"inexpensive bandwidth"},{"t":"capacity and recovery","q":"capacity, recovery"},{"t":"production support","q":"production support"}]},{"model":"Claude","from":"2026-07-09","to":"2026-07-14","added":[{"t":"raw protocol support","q":"real support for TCP/UDP, WebSockets"},{"t":"persistent volumes","q":"persistent volumes"},{"t":"hardware-adjacent control","q":"hardware-adjacent control"}],"dropped":[{"t":"sub-second cold starts","q":"sub-second cold starts"},{"t":"pricing scales to zero","q":"pricing that scales to zero"},{"t":"built-in Redis options","q":"built-in Postgres/Redis options"}]}],"api":"https://modelsagree.com/api/v1/best/best-container-hosting-platform-for-backends.json"},{"slug":"best-app-hosting-for-side-projects","title":"Best app hosting for side projects","rank":2,"of":6,"score":8,"appearances":3,"modelRanks":{"ChatGPT":5,"Claude":2,"Gemini":3},"reason":"Real containers on real VMs in 30+ regions, scale-to-zero machines, gRPC/WebSockets/anything-TCP just works, and pricing stays cheap for tiny apps; most control per dollar without doing ops","reasons":[{"model":"Claude","reason":"Real containers on real VMs in 30+ regions, scale-to-zero machines, gRPC/WebSockets/anything-TCP just works, and pricing stays cheap for tiny apps; most control per dollar without doing ops"},{"model":"Gemini","reason":"Direct deployment of Docker containers to Firecracker micro-VMs in multiple regions, yielding exceptional edge performance."},{"model":"ChatGPT","reason":"Runs containers close to users, supports persistent volumes and private networking, offers strong regional control, and handles stateful workloads more flexibly than typical serverless hosts"}],"fixes":[{"model":"ChatGPT","fix":"Make operations, troubleshooting, and cost management approachable for developers without infrastructure expertise"},{"model":"Claude","fix":"Smooth out reliability and support rough edges — indie hackers still trade horror stories about opaque incidents and debugging platform-side failures alone"},{"model":"Gemini","fix":"Simplify the complex CLI-heavy setup, networking configuration, and inconsistent dashboard UX."}],"updated":"2026-07-10","rank_history":{"days":["2026-07-07","2026-07-08","2026-07-09","2026-07-10"],"ranks":[4,2,5,5]},"reasoning_shift":[{"model":"ChatGPT","from":"2026-07-09","to":"2026-07-10","added":[{"t":"more flexible than serverless hosts","q":"handles stateful workloads more flexibly than typical serverless hosts"},{"t":"cost management","q":"cost management"}],"dropped":[{"t":"Postgres options","q":"Postgres options"}]}],"api":"https://modelsagree.com/api/v1/best/best-app-hosting-for-side-projects.json"},{"slug":"best-paas-platforms-for-hosting-django-applications","title":"Best PaaS platforms for hosting Django applications","rank":3,"of":7,"score":10,"appearances":4,"modelRanks":{"ChatGPT":5,"Claude":3,"Gemini":3,"Grok":3},"reason":"Runs your Django container on Firecracker VMs close to users worldwide with real multi-region support, IPv6/private networking, and excellent CLI ergonomics; the strongest option when you've outgrown pure buildpack platforms but don't want Kubernetes.","reasons":[{"model":"Claude","reason":"Runs your Django container on Firecracker VMs close to users worldwide with real multi-region support, IPv6/private networking, and excellent CLI ergonomics; the strongest option when you've outgrown pure buildpack platforms but don't want Kubernetes."},{"model":"Gemini","reason":"Exceptional for globally distributed Django applications by deploying code as Firecracker microVMs close to users, offering built-in private WireGuard networks and easy read-replica database configurations."},{"model":"Grok","reason":"Global edge deployment (low latency for users worldwide), Docker-first with good Django support via flyctl, competitive pricing for always-on or distributed apps, strong scaling and regional choice valued by practitioners needing performance beyond single-region PaaS."},{"model":"ChatGPT","reason":"Strongest option here when low-latency regional placement and infrastructure flexibility matter: Django-aware launch tooling, inexpensive Machines, global Anycast networking, process groups, private networking, volumes, and managed PostgreSQL."}],"fixes":[{"model":"ChatGPT","fix":"It exposes substantially more infrastructure complexity—capacity, regions, volumes, database topology, and scaling—than a typical Django practitioner seeking a hands-off PaaS may want."},{"model":"Claude","fix":"It's PaaS-adjacent rather than fully managed — you own the Dockerfile, Postgres (fly-managed offering is still young), and debugging platform quirks; reliability incidents and hands-on ops make it wrong for teams wanting a zero-ops experience."},{"model":"Gemini","fix":"Higher operational complexity and a history of routing and platform stability issues require more system-level expertise to manage than traditional PaaS."}],"updated":"2026-07-18","rank_history":{"days":["2026-07-17","2026-07-18"],"ranks":[3,5]},"api":"https://modelsagree.com/api/v1/best/best-paas-platforms-for-hosting-django-applications.json"},{"slug":"best-serverless-container-platforms-for-background-workers","title":"Best serverless container platforms for background workers","rank":4,"of":11,"score":6,"appearances":3,"modelRanks":{"Claude":4,"Gemini":4,"Grok":4},"reason":"Machines start stopped containers in hundreds of milliseconds, giving genuinely fast scale-from-zero for worker processes at very low cost, with a simple API for programmatic spawn-per-job patterns and multi-region placement that big clouds make expensive; best value for small teams running modest worker fleets.","reasons":[{"model":"Claude","reason":"Machines start stopped containers in hundreds of milliseconds, giving genuinely fast scale-from-zero for worker processes at very low cost, with a simple API for programmatic spawn-per-job patterns and multi-region placement that big clouds make expensive; best value for small teams running modest worker fleets."},{"model":"Gemini","reason":"Provides the Fly Machines API for sub-second container startups and programmatically controlled ephemeral workers globally, with very low developer friction."},{"model":"Grok","reason":"Firecracker microVM containers with multi-region placement, volumes, process groups for workers, suspend/resume for cost efficiency on idle backgrounds, and CLI-first control that delivers low-latency global async tasks without full K8s overhead."}],"fixes":[{"model":"Claude","fix":"Reliability track record trails the hyperscalers — a history of platform incidents and thinner managed-queue ecosystem means you bring your own queue and build more resilience yourself."},{"model":"Gemini","fix":"Platform stability issues and networking quirks can occasionally disrupt workloads, making it less suitable for mission-critical enterprise pipelines."},{"model":"Grok","fix":"More ops/CLI-oriented than dashboard-simple PaaS; usage-based pricing requires monitoring, and it's less \"set-and-forget\" for pure serverless scale-to-zero than hyperscalers."}],"updated":"2026-07-18","rank_history":{"days":["2026-07-17","2026-07-18"],"ranks":[4,null]},"api":"https://modelsagree.com/api/v1/best/best-serverless-container-platforms-for-background-workers.json"},{"slug":"best-container-paas-platforms-for-small-teams-deploying-monorepos","title":"Best container PaaS platforms for small teams deploying monorepos","rank":4,"of":9,"score":3,"appearances":2,"modelRanks":{"ChatGPT":4,"Claude":5},"reason":"Best when container control and global placement matter: flexible Docker builds, multiple monorepo apps or build targets, low-level Machines, Anycast networking, private networking, volumes, autostart and autostop, and managed Postgres.","reasons":[{"model":"ChatGPT","reason":"Best when container control and global placement matter: flexible Docker builds, multiple monorepo apps or build targets, low-level Machines, Anycast networking, private networking, volumes, autostart and autostop, and managed Postgres."},{"model":"Claude","reason":"Best when you want containers close to users — global multi-region deploys, real persistent volumes and Fly Machines, and fly.toml-per-app works for a monorepo; strong for latency-sensitive or stateful apps at modest cost."}],"fixes":[{"model":"ChatGPT","fix":"It is not a turnkey Git-driven monorepo PaaS; CI, previews, multi-service orchestration, and regional storage decisions remain the team’s responsibility."},{"model":"Claude","fix":"More infra-forward and historically bumpy on reliability/support; monorepo multi-service orchestration is manual (one config/app per service), so DX trails Railway/Render. Near-tie with Cloud Run — pick Fly for edge/stateful, Cloud Run for pure scale-to-zero value."}],"updated":"2026-08-03","api":"https://modelsagree.com/api/v1/best/best-container-paas-platforms-for-small-teams-deploying-monorepos.json"},{"slug":"best-app-hosting","title":"Best platform to deploy a web app","rank":7,"of":9,"score":4,"appearances":2,"modelRanks":{"Gemini":4,"Grok":4},"reason":"Exceptional for running containerized servers close to users across a global network of micro-VMs, with easy horizontal scaling and built-in private networking.","reasons":[{"model":"Gemini","reason":"Exceptional for running containerized servers close to users across a global network of micro-VMs, with easy horizontal scaling and built-in private networking."},{"model":"Grok","reason":"unique global edge deployment of lightweight containers (Fly Machines) that puts compute close to users worldwide for low-latency modern apps, especially strong for real-time features, WebSockets, and stateful services with colocated storage"}],"fixes":[{"model":"Gemini","fix":"Higher operational complexity around volume management and networking, combined with occasional platform/registry stability issues."},{"model":"Grok","fix":"build a more polished GUI, templates, and onboarding flow so developers who aren't infrastructure experts can adopt it as easily as simpler PaaS options without heavy CLI reliance"}],"updated":"2026-07-15","rank_history":{"days":["2026-06-29","2026-06-30","2026-07-07","2026-07-08","2026-07-09","2026-07-10","2026-07-14","2026-07-15"],"ranks":[7,9,4,4,5,6,6,8]},"api":"https://modelsagree.com/api/v1/best/best-app-hosting.json"}],"page":"https://modelsagree.com/product/fly-io","check":"https://modelsagree.com/check?q=Fly.io","updated":"2026-08-10T18:18:45.051Z","attribution":"modelsagree.com, CC BY 4.0"}