Nebula vs ZeroTier
A detailed comparison to help you choose between Nebula and ZeroTier.
Quick Verdict
3.9/5
Nebula
0 reviews
3.7/5
ZeroTier
0 reviews
Nebula is rated higher (3.9 vs 3.7). Nebula is an open source scalable overlay networking tool built by Slack engineers. Creates a flat network where distributed nodes communicate securely. Firewall rules in the protocol. ZeroTier creates virtual Ethernet networks over the internet. Connect servers, VMs, and devices as if on the same LAN. Personal plan is free for 10 devices (non-commercial). SDN-based layer-2 architecture.
Nebula Scalable overlay network built by Slack | ZeroTier Virtual networking — Ethernet over the internet | |
|---|---|---|
| Overview | ||
| Rating | 3.9 (0 reviews)✓ | 3.7 (0 reviews) |
| Pricing model | free | freemium |
| Starting price | Free | Free tier available |
| Best for | Infrastructure engineers building a large self-hosted mesh across clouds and colos who want identity-based networking with no SaaS dependency and can run a certificate authority safely. | Homelab operators, LAN-dependent software, and device-heavy, user-light fleets that need a flat virtual Ethernet network |
| Features | ||
| IPv6 | ✓ | |
| DDoS protection | ||
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ||
| Free tier | ||
| Tags | ||
| Tags | free tieropen sourceself hostable | free tieropen sourceapi access |
| Visit Nebula → | Visit ZeroTier → | |
Nebula
Pros
- + Free and open source; no vendor sits on your data path
- + Proven at scale — Slack's overlay runs on 50,000+ documented production hosts
- + Modern, non-homegrown crypto: Noise Protocol Framework, Curve25519/P256, AES-256-GCM
- + Certificate-based identity with groups-style firewall rules enforced between peers
- + Direct peer-to-peer tunnels with NAT traversal; lighthouses handle discovery only
Cons
- - You run the PKI: CA key custody, one-year default CA lifetime, certificate signing per node
- - No GUI, no hosted control plane, no SSO in the open-source edition
- - Operationally steeper than WireGuard and much steeper than managed mesh products
- - Overlay IPv6 and mobile client polish lag the desktop experience
- - No support contract or SLA unless you buy the third-party managed offering
ZeroTier
Pros
- + True layer-2 virtual Ethernet: broadcast and multicast work, unlike WireGuard-based overlays
- + Free Personal plan covers a 10-device homelab with no time limit
- + Native IPv6 support with RFC 4193, 6PLANE /80 delegation and public prefix routing
- + Lightweight agents (under 16 MB memory) with broad platform support including MikroTik and Docker
- + Direct peer-to-peer paths keep traffic off vendor infrastructure when NAT traversal succeeds
Cons
- - Free tier shrank to 10 devices, one network, non-commercial only; no API without a paid plan
- - No forward secrecy in its Salsa20/Poly1305 protocol, unlike WireGuard-based rivals
- - Since v1.16 the controller is non-commercial source-available; commercial self-hosting means Enterprise
- - Relayed fallback traffic is slow, and paid Premium Relays are still listed as coming soon
- - Monthly-only, non-refundable subscriptions with configuration lockout if payment lapses
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