strongSwan vs ProtonVPN (Infrastructure)
A detailed comparison to help you choose between strongSwan and ProtonVPN (Infrastructure).
Quick Verdict
3.7/5
strongSwan
0 reviews
3.9/5
ProtonVPN (Infrastructure)
0 reviews
ProtonVPN (Infrastructure) is rated higher (3.9 vs 3.7). Modular open-source IPsec/IKE (IKEv2, RFC 7296) suite for site-to-site and remote-access VPNs, with X.509, smartcard/TPM, and EAP authentication. Runs on Linux, FreeBSD, macOS, Windows, and Android; GPLv2, free. 20,000+ servers in 140+ countries (vendor); 20,681 servers at 191 locations in 148 nations per Wikipedia citing Proton
strongSwan Open-source IPsec VPN implementation for Linux and embedded systems | ProtonVPN (Infrastructure) VPN with encrypted infrastructure and no-log policy | |
|---|---|---|
| Overview | ||
| Rating | 3.7 (0 reviews) | 3.9 (0 reviews)✓ |
| Pricing model | free | freemium (Proton Free plan exists with unlimited data) |
| Starting price | Free | Free tier available |
| Best for | Infrastructure teams building standards-compliant IPsec gateways, site-to-site tunnels, or certificate/EAP-based remote access on Linux, BSD, or embedded hardware, who are comfortable operating open-source security software. | Privacy-conscious users and small teams wanting an audited no-logs VPN with Swiss jurisdiction, open-source clients, and a free tier that does not expire into uselessness. |
| 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 | open sourceteam features |
| Visit strongSwan → | Visit ProtonVPN (Infrastructure) → | |
strongSwan
Pros
- + Complete IKEv2 (RFC 7296) implementation with IKEv1 legacy support, free under GPLv2
- + Deep authentication: X.509 attribute certificates, PKCS#11 smartcards, TPM 2.0, EAP/RADIUS
- + Multiplatform — Linux, FreeBSD, macOS, Windows (MinGW), and a native Android client
- + Two-node HA mode with state takeover, MOBIKE for roaming peers, full IPv6 support
- + Plugin architecture and distro packages make it embeddable and easy to deploy
Cons
- - Steep configuration learning curve — swanctl, IKE proposals, and IPsec policy are expert tooling
- - No vendor SLA; free community support, commercial support is optional and limited
- - Overkill for simple server-to-server encryption where WireGuard is easier and faster
- - Patching and PKI operations are entirely on you
- - No control plane, dashboard, or appliance — it is a component, not a product
ProtonVPN (Infrastructure)
Pros
- + Published third-party no-logs audits (Securitum) and open-source client apps — verifiable privacy claims, not slogans
- + Genuinely usable free tier with unlimited data and no credit card requirement
- + Swiss jurisdiction under Proton AG, moving to a non-profit foundation structure since 2024
- + WireGuard/OpenVPN/IKEv2 plus Stealth protocol for networks that block VPN traffic
- + Secure Core routing counters compromised-datacenter risk; NetShield blocks ads, trackers, and malware
- + Paid plans cover 10 devices across 140+ countries with priority support and a 30-day money-back guarantee
Cons
- - $9.99/month rolling price is at the top of the mainstream VPN market; real value requires a 1-2 year prepayment
- - Free tier is one device with random country assignment from ten — no location control
- - Most of the 20,000+ server fleet is rented from third-party network operators rather than Proton-owned hardware
- - No published uptime SLA — the 30-day money-back guarantee is the only contractual commitment
- - Primarily a privacy/access product: no site-to-site networking, static IPs, or deep zero-trust policy on standard plans
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