OpenVPN Access Server vs ZeroTier: which wins in 2026?
Head-to-head on the facts that decide the purchase: real prices in the provider's own unit, minimum, KYC, proof, payment and terms - every number sourced in the linked reviews.
The incumbent of self-hosted business VPNs, and still a safe pick in 2026 - with one honest fork in the road. Access Server is the polished, supported way to run OpenVPN on your own hardware: web admin UI, one-click client provisioning, MFA, SAML/RADIUS/LDAP, clustering and now DCO kernel acceleration, with a genuinely usable free tier of 2 simultaneous connections (verified live 2026-11-03). The community edition underneath is the same GPLv2 protocol with no connection limit but no UI - and r/OpenVPN threads still open with users confused about exactly this split, which the company could document better. The audit record is unusually strong for 25-year-old C code: Quarkslab 2017, Trail of Bits 2022-2023 (no significant flaws), and a 2026 SRLabs audit of 2.7 release candidates that found 18 issues including one critical unauthenticated-DoS logic inversion - fixed before release, which is the system working, but a reminder that 'audited since 2017' is not 'bug-free'. Costs scale per connection and get 'stupid expensive' for medium-sized teams by community consensus, Pritunl and WireGuard/Headscale are the usual escapes, and OpenVPN remains trivially detectable by DPI - this is a remote-access tool, not an anti-censorship tool.
A network fabric, not an anonymity VPN - and the honest category match for it is 'Hamachi successor with an enterprise SDN conscience'. ZeroTier connects YOUR devices into flat virtual Layer 2 (or routed Layer 3) networks with end-to-end encryption, works behind CGNAT, and its free Personal tier still costs nothing. The trust questions are the same shape as Tailscale's, answered differently: the four planetary root servers are run by ZeroTier Inc. and see peer identities and IP metadata (payload is end-to-end encrypted and roots only relay ciphertext), the hosted controller is closed, and the 2021 Pulse Security research showed root-server trust is real attack surface - responsibly fixed, but instructive. The 2025 story is commercial: a new CEO, a $13.5M Series A, a free tier cut to 10 devices/1 network, Essential jumped to $18/month with $2 per extra device, and the controller code moved into a 'nonfree' source-available directory with commercial-use restrictions. The homelab community that built ZeroTier's reputation is visibly migrating to Tailscale, NetBird and Nebula; the technology (true L2 bridging, non-IP traffic, moons) remains genuinely differentiated. The full Trail of Bits code audit promised 'after 2.0' never appeared - ZeroTier 2.0 itself is still effectively vapor in the mainline product.
Short answer: OpenVPN Access Server wins overall (4.7/10 vs 4.1/10). ZeroTier is the better pick if you care most about privacy & logging. Facts checked 2026-11-03.
The facts
 OpenVPN Access Server | ZeroTier | |
|---|---|---|
| Overall score (0-10) | 4.7 | 4.1 |
| Privacy & proof | ||
| Logging claim | You are the operator: Access Server runs on your own Linux host, VM, Docker container or… | We collect minimal metadata about active networks and devices; ZeroTier routes traffic… |
| Logging evidence | no logging claim at all | promise only (no proof) |
| Audits | SRLabs (Security Research Labs), sponsored by Sovereign Tech… moreSRLabs (Security Research Labs), sponsored by Sovereign Tech Agency and Open Technology Fund 2026, Trail of Bits 2023, QuarksLab, coordinated by OSTIF (funded by a 33-company coalition) 2017, Dr Matthew Green (Johns Hopkins), commissioned by Private Internet Access 2016 | Trail of Bits 2020, Pulse Security (Denis Andzakovic) 2021 |
| Jurisdiction | United States - OpenVPN Inc., Pleasanton, California (about… moreUnited States - OpenVPN Inc., Pleasanton, California (about page fetched 2026-11-03); a Five Eyes member country | United States - ZeroTier, Inc., 548 Market St, San Francisco… moreUnited States - ZeroTier, Inc., 548 Market St, San Francisco, CA (privacy policy); a Five Eyes member country; ZeroTier Europe B.V. in Utrecht acts as GDPR representative |
| Owner | unknown | unknown |
| Money | ||
| Intro price | $7 /mo | $18 /mo |
| Renewal price | $7/mo | $18/mo |
| Anonymous payment | fiat | fiat |
| Account | ||
| Personal info | email account required | email only for the hosted controller service; no government-ID verification |
| Kind | Self-hosted | Self-hosted |
| Facts checked | 2026-11-03 | 2026-11-03 |
Score breakdown
OpenVPN Access Server leads on security (+1), censorship resistance (+4) · ZeroTier leads on privacy & logging (+1).
OpenVPN Access Server at a glance
++ What holds up
- Free forever for 2 simultaneous connections with every feature enabled, no card required (live pricing page 2026-11-03)
- Working web admin console out of the box - the most complete UI among self-hosted options by a distance (Meetrix 2026 comparison), and HN users report 10-minute DigitalOcean deployments
- Unusually deep audit history for VPN server code: Quarkslab/OSTIF 2017, Matthew Green crypto review 2016/2017, Trail of Bits 2022-2023, SRLabs 2026 - all with public reports
- Enterprise auth stack on every tier: PAM, LDAP, RADIUS, SAML/SSO, TOTP MFA, certificate auth, device registration (live feature table)
- One subscription covers clustered high-availability nodes; per-connection (not per-user) licensing, connections added or removed with prorated credit (2022 pricing page, fetched via Wayback)
-- What to watch
- Connection-based pricing adds up fast: $7/connection/month billed yearly (calculator verified live 2026-11-03); HN in 2021 already called it 'around $50 a month for more than 2 clients' and r/OpenVPN users call medium-size scaling 'stupid expensive'
- Access Server itself is closed source - the GPLv2 open-source part is the community edition daemon; no access-server repo exists in the OpenVPN GitHub org (checked via GitHub API 2026-11-03)
- OpenVPN is trivially detected and blocked by DPI; no obfuscation layer beyond TCP-443 disguise (Wikipedia + r/selfhosted thread, fetched 2026-11-03)
- The 2026 SRLabs audit found 18 issues in 2.7 release candidates including a critical unauthenticated DoS introduced in May 2022 that survived two prior audits and years of oss-fuzz
- Subscription activation requires reaching OpenVPN licensing servers - a dependency for airgapped-ish setups unless on the Free plan (support docs describe licensing-server connectivity troubleshooting)
ZeroTier at a glance
++ What holds up
- Free Personal tier (10 users, 10 devices, 1 network) - verified live 2026-11-03, though nerfed from the historical 25-node free tier per community reports
- True Layer 2 emulation: broadcast, multicast, LAN discovery, Ethernet bridging and non-IP traffic that WireGuard-based meshes cannot carry natively (protocol docs + VPNSmith)
- End-to-end encryption with keys that never leave devices; roots only relay ciphertext (operator security docs + founder statement on HN)
- Self-hostable controller and user-defined 'moon' root servers reduce dependency on ZeroTier Inc. infrastructure (operator docs)
- Two independent security research engagements engaged with and fixed: Trail of Bits crypto design review (2020, public summary) and Pulse Security root-identity research (2021, patched in 1.6.6 within days)
- FIPS 140-3 validated variant and SOC 2 Type II for the enterprise path; post-quantum Quantum platform for CNSA 2.0 mandates
-- What to watch
- The November 2025 pricing restructure cut the free tier to 10 devices/1 network and raised Essential to $18/month plus $2 per extra device - r/zerotier documented a >250 percent increase for legacy customers and a visible exodus to Tailscale, NetBird and Nebula
- The four planetary root servers are operated by ZeroTier Inc. in a Five Eyes jurisdiction and see member identities and IP metadata; the hosted Central controller is closed source
- Controller code now sits in a 'nonfree' directory under a source-available license that forbids commercial use without a paid license - the self-host path is narrower than it was under the old open-source positioning
- No forward secrecy in the standard VL1 protocol (documented in the operator's own protocol page); VPNSmith notes the proprietary transport has not received the breadth of independent audit and benchmarking that WireGuard has
- No public SOC 2 report (trust-center gated); the promised full Trail of Bits code audit never materialized
- ToS: all payments non-refundable, mandatory individual arbitration and class-action waiver, and 28 days of nonpayment leads to subscription deactivation and permanent deletion of network records
FAQ
Which is cheaper, OpenVPN Access Server or ZeroTier?
OpenVPN Access Server is cheaper at $7 /mo versus $18 /mo.
Which has better logging evidence, OpenVPN Access Server or ZeroTier?
ZeroTier has the stronger logging evidence; OpenVPN Access Server makes no no-logs claim at all.
Which renewal price is honest, OpenVPN Access Server or ZeroTier?
OpenVPN Access Server renews cheaper: $7/mo vs $18/mo - OpenVPN Access Server renews at 1x its intro price, ZeroTier at 1x.
Which needs less KYC, OpenVPN Access Server or ZeroTier?
At least one provider does not document its KYC policy - treat it as unknown, not as "no KYC".
Which has the longer track record?
OpenVPN Access Server has the longer track record (since 2002).
Scores and facts: meta-reviews with dated sources - OpenVPN Access Server · ZeroTier. Method: how we verify. More: all providers compared · all head-to-heads.