Cloudflare Vectorize vs Fly Machines
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 | Cloudflare Vectorize | Fly Machines |
|---|---|---|
| Developer / Organization | Cloudflare Inc. | Fly.io Inc. (Kurt Mackey & Team) |
| Open-Source Engine | ✓ Open Source (Apache-2.0) | ✓ Open Source (Apache-2.0) |
| GitHub Stars (Repo/SDK) | ★ 4,660 GitHub Stars | ★ 1,719 GitHub Stars |
| Core Repository Language | TypeScript | Go |
| Supported SDK Clients | ||
| Self-Hosted Deployment | Hosted Only | Hosted Only |
| Docker / Container Ready | Managed | ✓ Official Image |
| Model Context Protocol (MCP) | ✓ Native MCP | Standard REST/gRPC |
| Billing Architecture | usage based | usage based |
| Developer Free Tier | ✓ Yes 30M queried dimensions + 5M stored dimensions / mo | ✓ Yes 3 shared-cpu-1x microVMs allowance |
| Entry Paid Tier (Monthly) | $5 USD / mo | $1.94 USD / mo |
| Pricing & Cost Architecture | Free tier includes 30 million queried vector dimensions and 5 million stored vector dimensions per month. Paid Workers plan ($5/mo base) bills $0.01 per 1M queried dimensions. | 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). |
| Key Engineering Insight | Runs directly on Cloudflare's 300+ global edge data centers alongside Workers AI, eliminating cross-cloud network roundtrips during RAG retrieval. | Operates custom bare-metal servers across 35+ global edge datacenters, booting Linux kernels directly on KVM without container orchestration overhead. |
Strengths & Trade-Offs
Objective engineering evaluation of both platforms
Cloudflare Vectorize Evaluation
Key Advantages
- ✓ Zero cold-start edge execution: queries execute within milliseconds in 300+ global data centers
- ✓ Co-located with Workers AI: run embeddings and vector lookups within the same edge runtime
- ✓ Generous free tier allowing millions of dimensional queries every month at zero cost
Limitations & Trade-Offs
- ✕ Maximum index size of 5 million vectors per index on standard plans (designed for distributed edge retrieval)
- ✕ Requires building within or interfacing through the Cloudflare Workers ecosystem
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)
Source Quotes
Direct excerpts from official documentation backing our extracted specifications
Cloudflare Vectorize Documentation Proof
"Workers Paid plan starts at $5/month and charges $0.01 per million queried vector dimensions."
"Free tier includes 30 million queried dimensions and 5 million stored dimensions each month."
"Serverless cloud service natively integrated into the Cloudflare global network."
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."
Frequently Asked Questions: Cloudflare Vectorize vs Fly Machines
Architectural trade-offs and decision criteria
Is Cloudflare Vectorize or Fly Machines cheaper for developers?
Cloudflare Vectorize has a starting price of $5/mo (usage based), while Fly Machines starts at $1.94/mo (usage based). Cloudflare Vectorize includes a free tier (30M queried dimensions + 5M stored dimensions / mo). Fly Machines offers a free tier (3 shared-cpu-1x microVMs allowance).
Can I self-host Cloudflare Vectorize and Fly Machines in my own infrastructure?
Cloudflare Vectorize is a cloud-managed service only. In comparison, Fly Machines is proprietary cloud infrastructure.
Do Cloudflare Vectorize and Fly Machines support the Model Context Protocol (MCP)?
Cloudflare Vectorize has native support for MCP servers. Fly Machines does not advertise built-in MCP protocol bindings.
Which programming languages have official SDKs for Cloudflare Vectorize vs Fly Machines?
Cloudflare Vectorize provides official SDKs in: typescript, javascript, python, curl. Meanwhile, Fly Machines supports: go, curl, python.