Company snapshot
| Category | CacheFly | Peer5 |
|---|---|---|
| Status | active | defunct |
| Founded | — | — |
| Headquarters | — | — |
| Website | — | — |
| Docs | — | — |
Overview
CacheFly, founded in 2002 and based in Chicago, IL, is a content delivery network (CDN) provider specializing in high-performance delivery of static and dynamic content. It serves businesses in video streaming, gaming, software distribution, and e-commerce, emphasizing speed and reliability. CacheFly pioneered TCP Anycast routing in 2002, which optimizes traffic delivery to the nearest point of presence (PoP). Its customers range from startups to enterprises seeking efficient content delivery. The company has gained attention for capitalizing on recent CDN industry consolidation, positioning itself as an alternative to providers like StackPath and Lumen Technologies.
Peer5 operated a peer-to-peer (P2P) content delivery network (CDN) specializing in live video streaming, leveraging WebRTC for in-browser, clientless enterprise CDN (eCDN) solutions. Founded in 2012, the company was acquired by Microsoft in August 2021 to enhance video streaming capabilities in Microsoft Teams. Peer5’s technology optimized bandwidth usage through self-balancing mesh networks, serving large-scale enterprise events with up to 2 million concurrent users. As of 2025, Peer5’s standalone services are defunct, with its technology integrated into Microsoft’s eCDN for Teams.
Network & Architecture
CacheFly operates over 75 points of presence (PoPs) across all seven continents, with a strong presence in North America, Europe, Asia, South America, Australia, Africa, and the Middle East. Its network uses TCP Anycast for efficient routing, ensuring low-latency delivery. CacheFly reports a 98% cache hit ratio, with 100% availability for its S.O.S. (Storage Optimization Service) customers. The network is optimized for high-throughput use cases like large file downloads and media streaming. It has a notable footprint in Latin America compared to some competitors but may have fewer PoPs in certain regions compared to larger providers like Cloudflare or Akamai.
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Feature comparison
| Feature | CacheFly | Peer5 |
|---|---|---|
waf | ✗ | ✗ |
bot_mitigation | ✗ | ✗ |
ddos | ✓ | ✗ |
rate_limit | ✗ | ✗ |
http3_quic | ✓ | ✗ |
tls13 | ✓ | ✗ |
tiered_cache | ✓ | ✗ |
origin_shield | ✓ | ✗ |
instant_purge | ✓ | ✓ |
stale_while_revalidate | ✗ | ✗ |
stale_if_error | ✗ | ✗ |
image_optimization | ✓ | ✗ |
video_vod | ✓ | ✗ |
video_live | ✓ | ✓ |
drm | ✗ | ✗ |
hls_dash_packaging | ✗ | ✗ |
websockets | ✓ | ✗ |
signed_urls | ✓ | ✗ |
edge_compute | ✗ | ✗ |
functions | ✗ | ✗ |
kv_storage | ✗ | ✗ |
api_first | ✓ | ✓ |
realtime_logs | ✓ | ✓ |
log_push | ✓ | ✗ |
terraform | ✗ | ✗ |
Legend: ✓ = Supported, ✗ = Not supported, — = Not listed
Pricing
CacheFly offers pay-as-you-go (PAYG) and enterprise plans, with a free tier providing 5TB of monthly usage. Pricing is flexible with month-to-month billing and no long-term contracts. A special offer for former StackPath customers includes 64TB for $595. New users can access a free month of service. Detailed pricing is available at https://www.cachefly.com/pricing/.
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Integrations & DevEx
CacheFly provides an API-first platform for configuration and management, with comprehensive documentation at https://www.cachefly.com/docs/. Realtime logs and analytics support performance monitoring, and log push enables integration with external systems. A dedicated Slack channel is available for enterprise accounts to ensure responsive support. Migration guides are provided for customers transitioning from StackPath and Lumen Technologies, including self-service setup and white-glove onboarding for accounts using over 150TB monthly. Terraform support is not documented.
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When it fits
- Businesses needing high-throughput CDN for video streaming, gaming, or large file downloads, particularly with global audiences.
- Companies migrating from StackPath or Lumen Technologies, leveraging CacheFly’s dedicated transition support.
- Developers seeking an API-first CDN with flexible pricing and a free tier for testing or small-scale projects.
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When it doesn’t
- Organizations requiring advanced edge compute or serverless functions, which CacheFly does not currently offer.
- Users needing robust WAF, bot mitigation, or rate-limiting features, as these are not publicly documented.
- Companies focused on China-specific delivery, where CacheFly lacks a specialized license compared to providers like Tencent CDN.
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History & Notes
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Peer5 was known for its innovative use of WebRTC to create a decentralized, browser-based P2P CDN, reducing server load and improving video delivery for large audiences. The company powered events for over 1 billion users before its acquisition. No official EOL announcement for standalone services was found, but Peer5’s website now redirects to Microsoft’s eCDN page, indicating full integration. Some third-party sources mention continued support for existing Peer5 customers post-acquisition, but this is unconfirmed as of 2025.