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Understand the differences before you shortlist.

Fastly×

Nebula×

Attribute	FastlyOther license	NebulaOpen source
Overview
Primary focus	CDN, edge compute, and web app/API security platform	Open-source, self-hosted mesh VPN built by Slack
Deployment	Not specified	Self-hosted
Source model	Other license	Open source
Pricing model	freemium	open source
API available	Not specified	Not specified
Windows desktop	Not specified	Not specified
Mobile app	Not specified	Not specified
Overview	Fastly provides a global CDN, WebAssembly-based edge compute (Compute), and application security (WAF, bot management, API security, DDoS protection), with a free tier plus usage-based and flat-rate packages.	Nebula is an open-source overlay networking tool that builds encrypted, peer-to-peer mesh networks without opening inbound firewall ports; it was built at Slack and is now maintained by Defined Networking.
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Primary focus: CDN, edge compute, and web app/API security platform
Deployment: Not specified
Source model: Other license
Pricing model: freemium
API available: Not specified
Windows desktop: Not specified
Mobile app: Not specified
Overview: Fastly provides a global CDN, WebAssembly-based edge compute (Compute), and application security (WAF, bot management, API security, DDoS protection), with a free tier plus usage-based and flat-rate packages.

Primary focus: Open-source, self-hosted mesh VPN built by Slack
Deployment: Self-hosted
Source model: Open source
Pricing model: open source
API available: Not specified
Windows desktop: Not specified
Mobile app: Not specified
Overview: Nebula is an open-source overlay networking tool that builds encrypted, peer-to-peer mesh networks without opening inbound firewall ports; it was built at Slack and is now maintained by Defined Networking.

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