Fly Machines vs Supabase Vector
Comparing architecture, runtime limits, open-source licenses, and monthly costs for autonomous agent pipelines.
Detailed Specifications & Compatibility Matrix
Extracted directly from GitHub REST API & official developer documentation
| Technical Feature / Metric | Fly Machines | Supabase Vector |
|---|---|---|
| Developer / Organization | Fly.io Inc. (Kurt Mackey & Team) | Supabase Inc. (Paul Copplestone & Ant Wilson) |
| Open-Source Engine | ✓ Open Source (Apache-2.0) | ✓ Open Source (Apache-2.0) |
| GitHub Stars (Repo/SDK) | ★ 1,719 GitHub Stars | ★ 113,917 GitHub Stars |
| Core Repository Language | Go | TypeScript |
| Supported SDK Clients | ||
| Self-Hosted Deployment | Hosted Only | ✓ Supported |
| Docker / Container Ready | ✓ Official Image | ✓ Official Image |
| Model Context Protocol (MCP) | Standard REST/gRPC | ✓ Native MCP |
| Billing Architecture | usage based | hybrid |
| Developer Free Tier | ✓ Yes 3 shared-cpu-1x microVMs allowance | ✓ Yes 500MB database storage (2 free projects) |
| Entry Paid Tier (Monthly) | $1.94 USD / mo | $25 USD / mo |
| Pricing & Cost Architecture | Pay-as-you-go billed per second: shared CPU microVMs start at ~$0.0000022/second (~$1.94/month if running 24/7). Stopped machines pay only for attached NVMe disk storage ($0.15/GB/mo). | Free tier offers 2 managed projects with 500MB database storage (~250k vectors). Pro plan starts at $25/mo with 8GB storage and scalable compute add-ons. |
| Key Engineering Insight | Operates custom bare-metal servers across 35+ global edge datacenters, booting Linux kernels directly on KVM without container orchestration overhead. | Allows developers to store relational application state, user authentication (Row Level Security), and high-dimensional vector embeddings inside a single ACID-compliant Postgres database. |
Strengths & Trade-Offs
Objective engineering evaluation of both platforms
Fly Machines Evaluation
Key Advantages
- ✓ Sub-300ms boot times for custom Docker images running in 35+ global edge data centers close to end users
- ✓ Full persistent NVMe volume support with customizable memory/vCPU ratios per individual machine instance
- ✓ Fast REST API allowing agents to dynamically spawn, pause, snapshot, and destroy microVMs programmatically
Limitations & Trade-Offs
- ✕ Requires managing base Linux Docker images, security firewall configurations, and internal WireGuard routing
- ✕ Lacks a specialized high-level code execution SDK out of the box (requires building custom API wrappers)
Supabase Vector Evaluation
Key Advantages
- ✓ Combines vector search with full Postgres ecosystem: Row Level Security, ACID transactions, and relational joins
- ✓ Instant auto-generated client APIs (REST, GraphQL, real-time WebSockets) with zero backend boilerplate
- ✓ Permissive open-source stack with official Docker compose deployment for self-hosting on any VPS
Limitations & Trade-Offs
- ✕ Free tier projects pause automatically after 7 days of inactivity (resumed upon dashboard login)
- ✕ Dedicated standalone C++ vector stores can achieve higher raw QPS for multi-million vector datasets
Source Quotes
Direct excerpts from official documentation backing our extracted specifications
Fly Machines Documentation Proof
"Shared CPU instances start at $0.0000022/second (~$1.94/mo)."
"Free resource allowances include up to 3 shared-cpu-1x microVMs."
"Global microVM platform running on Fly.io bare metal hardware."
Supabase Vector Documentation Proof
"Pro plan is $25/month including 8GB disk space, 100k monthly active users, and no project pausing."
"Free tier includes 2 free projects, 500MB database space, and up to 50,000 monthly active users."
"Supabase is open source and self-hostable with Docker."
Frequently Asked Questions: Fly Machines vs Supabase Vector
Architectural trade-offs and decision criteria
Is Fly Machines or Supabase Vector cheaper for developers?
Fly Machines has a starting price of $1.94/mo (usage based), while Supabase Vector starts at $25/mo (hybrid). Fly Machines includes a free tier (3 shared-cpu-1x microVMs allowance). Supabase Vector offers a free tier (500MB database storage (2 free projects)).
Can I self-host Fly Machines and Supabase Vector in my own infrastructure?
Fly Machines is a cloud-managed service only. In comparison, Supabase Vector is available for self-hosting with Apache-2.0 licensing.
Do Fly Machines and Supabase Vector support the Model Context Protocol (MCP)?
Fly Machines does not currently list native MCP server compatibility. Supabase Vector fully supports Model Context Protocol integrations.
Which programming languages have official SDKs for Fly Machines vs Supabase Vector?
Fly Machines provides official SDKs in: go, curl, python. Meanwhile, Supabase Vector supports: typescript, python, dart, swift, go.