⚡ 簡単な評価:
- 価格: OpenVPN starts free, with paid plans from $7/month. OysterVPN starts at $5.99/month.
- 最適な用途: OpenVPN for secure remote access and private networks. OysterVPN for everyday browsing and torrenting.
- 主な違い： OpenVPN is a protocol and 仕事 platform you configure. OysterVPN is a ready-made consumer app.
- 私たちのおすすめ： OpenVPN (4.3/5) for security and control. OysterVPN (3.5/5) if you just want a simple app.
Here’s the odd part about this matchup.
OysterVPN can actually run on the OpenVPN protocol.
So you’re not comparing two rival apps.
You’re comparing a security engine with a car built around engines like it.
OpenVPN gives you raw control over every VPN tunnel you build.
OysterVPN hands you a finished VPN service with servers already running.
概要
This OpenVPN vs Oyster VPN comparison covers security, privacy, speed, streaming, setup, and price.
私たちは両ツールのドキュメント、価格ページ、ユーザーレビューを確認しました。
私たちのライター陣は、それぞれの動物と実際に触れ合う時間も設けました。
それらのメモは、以下の「チームが気づいたこと」のセクションに記載されています。
By the end, you’ll know which one fits the way you work.
OpenVPN とは何ですか?
A virtual private network hides your traffic inside an encrypted tunnel.
OpenVPN is an open source VPN protocol first released in 2001.
It builds a secure tunnel between a VPN client and a VPN server.
The OpenVPN software creates secure connections for VPN clients on almost any device.
That tunnel uses SSL/TLS, the same family as the secure sockets layer.
OpenVPN is one protocol, but it is also a company with paid products.
The OpenVPN company (OpenVPN Technologies) sells Access Server and a cloud service.
Businesses use it for remote access to company private networks.
Here’s a quick video walkthrough of how it all fits together.
🏆 Winner: OpenVPN
Build your own encrypted network with open code anyone can inspect. Start on the free tier and scale when your team grows.
OpenVPNの価格設定
The open source OpenVPN protocol costs nothing. The paid plans cover the hosted 仕事 製品。
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 無料 | $0 | Solo users and small test setups |
| 成長 | 月額7ドル | Small teams that need hosted remote access |
| 企業 | カスタム | Large companies with complex networks |
Pricing verified September 2026.
無料トライアル: You don’t need one. The free tier and the OpenVPN Community Edition cost $0 with no time limit.
返金保証: Paid business plans follow OpenVPN’s own billing terms. Check them before you upgrade.
📌 注記： OpenVPN free really means free software. You still need a server, or a VPN provider, to connect through.
⚠️ 警告： Self-hosting has hidden costs. Your time, server rent, and upkeep add up fast.
OpenVPNの主な利点
Here’s what makes OpenVPN worth a look.
- コードを開く: Anyone can inspect the source for flaws. A global community of developers checks and updates it.
- Two transport modes: OpenVPN UDP favors speed. OpenVPN TCP favors reliable, in-order delivery.
- 強い 暗号 choices: It supports AES, Blowfish, and other encryption ciphers. You pick the key lengths.
- Firewall friendly: It slips through firewalls and NAT gateways well. That helps on strict office or ホテル ネットワーク。
- Runs almost anywhere: Windows、macOS、Linux、Android、 iOS. It even runs on Tomato and Solaris.
- あなたに合わせてスケールします: Start with one laptop. Grow into site-to-site links for large organizations.
私たちのチームが気づいたこと
私たちの 作家 installed OpenVPN and worked through the setup firsthand. Here’s what stood out from that hands-on time:
OpenVPNのメリットとデメリット
✅ メリット
- Open source code that anyone can audit
- Free Community Edition with no time limit
- Perfect Forward Secrecy protects past sessions
- Works through firewalls and NAT gateways
❌ デメリット
- WireGuardのような新しいプロトコルよりも遅い
- 手動設定は初心者には難しい
- Mobile setup feels clunkier than desktop
OysterVPNとは何ですか？
OysterVPN is a consumer VPN service based in Ireland.
Ireland sits outside the 5/9/14 Eyes surveillance alliances.
The service encrypts your traffic and hides your IP addresses.
It routes your connection through remote servers in other countries.
That lets you reach geo restricted content like Netflix or BBC iPlayer.
You get a user friendly interface on desktop and mobile.
This short video shows the OysterVPN app in action.
オイスターVPN
A plug-and-play VPN app with a kill switch and ad blocker. Every plan comes with a 30-day refund window.
OysterVPNの価格設定
OysterVPN has one feature tier. You only choose how long your OysterVPN subscription runs.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 1ヶ月＋2ヶ月無料 | 月額5.99ドル | サービスを短期間試してみる |
| 1年 | 月額29.99ドル | Regular users who want a year covered |
| 生涯アクセス | 月額59.99ドル | Set-and-forget buyers |
Pricing verified September 2026.
💡 Price check: Some review sites list the monthly plan at $9.99 with 3 free months. They show the yearly plan at $2.50 per month. They list lifetime access as a one-off $49.99 payment. Confirm the final price at checkout.
無料トライアル: No. OysterVPN has no free trial and no free VPN tier.
返金保証: All plans come with a 30-day money back guarantee. You can test the service risk free.
📌 注記： Every plan unlocks the same OysterVPN features. You can use them on up to five デバイス すぐに。
⚠️ 警告： To purchase OysterVPN, you need a major credit card or PayPal. It does not accept cryptocurrency.
OysterVPNの主な利点
Here’s what OysterVPN offers for everyday online security.
- AES-256 encryption: あなたの データ is scrambled with AES-256. That keeps sensitive data away from snoops on public Wi-Fi.
- Protocol choice: The app lists WireGuard, OpenVPN, and IKEv2. You can switch between secure VPN protocols in settings.
- Leak blocking: It stops IP, DNS, and WebRTC leaks. Your real location stays hidden.
- Ad and malware blocker: A built-in blocker filters ads and bad sites. No extra app needed.
- Torrent friendly: P2P is allowed on every server. The security tools suit file sharing.
- Lifetime access option: Pay once and skip yearly renewals. That’s rare among VPN providers.
私たちのチームが気づいたこと
Our writer signed up for OysterVPN and used the apps for daily browsing. Here’s what stood out:
OysterVPNのメリットとデメリット
✅ メリット
- Strict no logs policy and Irish jurisdiction
- Intuitive apps that beginners can use in minutes
- すべてのサーバーでトレントの使用が許可されています
- Unblocks Netflix, Max, ESPN+, and BBC iPlayer
❌ デメリット
- No third-party audit of its privacy claims
- Speeds drop by about 55% on distant servers
- No live chat or phone support
- No Linux app, smart TV app, or console app
機能比較
Both tools build virtual private networks, but they split hard on almost everything else. We’ll walk through nine features, then compare prices.
| 特徴 | オープンVPN | オイスターVPN |
|---|---|---|
| 開始価格 | $0 (paid from $7/month) | 月額5.99ドル |
| 無料プラン | ✅ | ❌ |
| オープンソースコード | ✅ | ❌ |
| Ready-Made Server Network | ❌ | ✅ |
| サイト間ネットワーク | ✅ | ❌ |
| ゼロトラストアクセス | ✅ | ❌ |
| Ad / Content Filtering | ✅ | ✅ |
| ストリーミングのブロック解除 | ❌ | ✅ |
| 第三者監査 | ✅ Public code review | ❌ |
| 最適な用途 | Teams and tech-savvy users | 予算を抑えたい初心者向け |
1. Tunneling Protocols
オープンVPN: Here’s how OpenVPN works. It is the tunneling protocol itself. It can run over the user datagram protocol for speed. Or it can use the transmission control protocol for reliability. TCP makes sure every packet arrives in order, and the UDP protocol skips that check.
オイスターVPN: OysterVPN lets you switch between WireGuard, OpenVPN, and IKEv2. That mix covers the main VPN protocols most people need. The app handles VPN connections without any config file.
⚠️ 警告： Some older reviews say OysterVPN lacks WireGuard. Update the app and check the protocol menu yourself.
2. Encryption & Authentication
オープンVPN: OpenVPN pulls encryption algorithms like AES and Blowfish from the OpenSSL library. Before data moves, a two-way authentication OpenVPN runs checks both sides. Each side shows certificates from a public key infrastructure. A hash message authentication code (HMAC) signs each packet. The TLS auth HMAC firewall then drops anything unsigned.
オイスターVPN: OysterVPN uses AES-256 across its apps. You never touch encryption keys, encryption protocols, or certificates. The app handles every handshake for you.
3. Privacy & Logging
オープンVPN: With self-hosted OpenVPN servers, you decide what gets logged. On the business side, logging is a feature. Admins want to see who opened which cloud app. Perfect Forward Secrecy means one leaked key can’t unlock past sessions.
オイスターVPN: OysterVPN promises a zero logging policy. It says it doesn’t collect or store your browsing data. But no independent firm has checked that claim.
💡 プロのヒント: A logs policy is only a promise until someone audits it. If you need an audited no logs policy, OysterVPN doesn’t have one yet.
4. キルスイッチと漏電防止
オープンVPN: OpenVPN itself doesn’t ship a one-click kill switch. You set up leak blocking through firewall rules or your OpenVPN client settings. That works, but it takes know-how.
オイスターVPN: OysterVPN includes an internet kill switch. If the VPN connection drops, it cuts your internet connection so nothing slips out. That prevents accidental data leaks on shaky Wi-Fi. It’s a crucial feature for torrenting.
OysterVPN also adds IP leak protection and DNS leak protection. Your DNS requests stay inside the tunnel, not with your internet service provider.
5. DNS Filtering & Ad Blocking
オープンVPN: OpenVPN’s business products include DNS security and content filtering. They block bad domains before anyone on your team loads them. It’s built for company policy, not for hiding ユーチューブ 広告。
オイスターVPN: OysterVPN has a built-in ad and malware blocker. You switch it on inside the app. It cleans up pages on news and streaming sites.
6. Remote Access & Network Defense
オープンVPN: This is where OpenVPN shines. The OpenVPN Access Server links remote staff to office networks. Site-to-site setups join whole branch offices, and admins manage all OpenVPN connections from one panel. Creating VPN tunnels between locations is a core use case.
オイスターVPN: OysterVPN isn’t made for company networks. Its defense focus is on you. DDoS protection shields your connection from flood attacks. That’s handy for gamers and streamers.
7. Devices & Connections
オープンVPN: OpenVPN runs on nearly all operating systems and even IoT gadgets. On your own server, you can allow unlimited connections. OpenVPN Connect and the OpenVPN GUI are free client software for your devices.
オイスターVPN: OysterVPN covers five simultaneous connections on multiple devices. The OysterVPN apps include desktop apps for Windows and マック. Its mobile apps cover an Android app and iOS app. There are no browser extensions and no native Linux app. Smart TVs and other streaming devices get no app either.
⚠️ 警告： OpenVPN on mobile devices is less user-friendly than on desktop. Expect to import .ovpn files by hand.
8. Speed, Servers & Streaming
オープンVPN: OpenVPN has no server network of its own for streaming. Your speed depends on your server hardware and where it sits. It’s also slower than WireGuard, though UDP mode closes some of the gap.
オイスターVPN: Server counts differ by source. Some list 150+ servers in 17 countries, others 400+ in 35+ countries. Either way, you get fewer server locations than big-name rivals. Connection speeds are decent on nearby servers. But OysterVPN’s speeds drop about 55% on distant servers.
On streaming, OysterVPN unblocks popular streaming services like Netflix, Max, and ESPN+. It struggles with Hulu, Disney+, and 4K video. Need dedicated streaming servers for those? Look elsewhere. On the plus side, OysterVPN’s servers all allow torrenting.
💡 プロのヒント: Run a speed test on the fastest server near your physical location. Compare download speed and upload speed before and after you connect.
9. Split Tunneling & App Control
オープンVPN: OpenVPN controls traffic with routing rules in the config file. On the business plans, you can give staff secure access to specific SaaS apps only. It’s flexible, but not point-and-click.
オイスターVPN: The split tunneling feature lets you pick which apps use the VPN tunnel. Your banking app can skip it while streaming stays protected. It’s only on the Windows and Android apps for now.
10. 価格設定とコスト
Here are both price lists side by side.
| ティア | オープンVPN | オイスターVPN |
|---|---|---|
| 無料 | 無料：0ドル | ❌ |
| エントリ | Growth: $7/month | 1-Month +2 Months free: $5.99/month |
| Longer term | — | 1-Year: $29.99/month |
| 最高級 | エンタープライズ：カスタム | Lifetime Access: $59.99/month |
オープンVPN: You can run OpenVPN for $0 if you host it yourself. The paid tiers make sense once a team needs hosted servers and admin tools.
オイスターVPN: You pay for a finished service with servers included. The lifetime access deal is the standout if you plan to keep it for years.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| $0 budget | オープンVPN | Free tier and free Community Edition |
| ストリーミングとトレント | オイスターVPN | Servers ready, P2P allowed everywhere |
| Office or team remote access | オープンVPN | Access Server and site-to-site links |
| Zero setup | オイスターVPN | Install, log in, connect |
| Maximum transparency | オープンVPN | Open code, public scrutiny |
| 1回限りの支払い | オイスターVPN | Lifetime access plan |
💰 あなたの予算
OpenVPN costs nothing if you already rent a server. If you don’t, OysterVPN’s plans are the cheaper path to a working VPN.
🔌 あなたの技術スタック
Linux users, router fans, and IT teams will feel at home with OpenVPN. It adds advanced security features like Zero Trust rules. OysterVPN has no Linux app, so it fits Windows, Mac, and phones best.
📝 毎日の使用
Browsing, Netflix, and torrents point to OysterVPN. Connecting staff to company servers points to OpenVPN.
🎓 あなたの経験レベル
Beginners should start with OysterVPN’s one-tap apps. Pick OpenVPN only if config files and certificates don’t scare you.
🆓 無料トライアルとデモ
OpenVPN lets you test forever on the free tier. OysterVPN has no trial, but the 30-day refund window works like one.
🛟 サポートオプション
OysterVPN’s customer support is email only. There’s no chat support or phone line. OpenVPN backs its paid plans with business support plus a huge community.
🌍 旅行 to Restrictive Countries
OysterVPN does not work reliably in places like China. A well-built OpenVPN server on TCP port 443 slips past filters more often.
切り替えガイド
Already using one of these? Here’s what changes if you move to the other.
🔄 Switching from OpenVPN to OysterVPN?
✅ 得られるもの：
- A ready server network in many countries
- One-tap kill switch, ad blocker, and leak protection
- Streaming unblocking without extra setup
❌ 失うもの：
- Full control over your own servers and logs
- Site-to-site and team remote access tools
- Open code you can inspect yourself
📋切り替え方法：
- Note which devices use your OpenVPN profiles, then remove them.
- Buy a plan and install OysterVPN on up to five devices.
- Pick the OpenVPN protocol in settings if you want the same tunnel type.
🔄 Switching from OysterVPN to OpenVPN?
✅ 得られるもの：
- A free option with no device cap on your own server
- Zero Trust rules and DNS filtering for teams
- Native Linux support and deep configuration
❌ 失うもの：
- Servers in other countries for streaming
- The simple, beginner-friendly apps
- The built-in ad and malware blocker
📋切り替え方法：
- Cancel inside 30 days if you want your OysterVPN refund.
- Install OpenVPN Access Server or sign up for the free tier.
- Import your .ovpn profile into OpenVPN Connect on each device.
私たちのレビューで取り上げられなかったこと
This comparison focused on individual users and small teams. We didn’t measure OpenVPN Enterprise features or custom pricing. We also didn’t check OysterVPN on routers or inside restrictive countries. Everything here reflects the September 2026 versions, so features may change. For a deeper look at one side, our OysterVPN review goes further.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰価格 | オープンVPN |
| 🔐 暗号化とプロトコル | オープンVPN |
| 🕵️ Privacy & Transparency | オープンVPN |
| 🏢 Remote Access & Networking | オープンVPN |
| 💻 Devices & Connections | オープンVPN |
| 👶 使いやすさ | オイスターVPN |
| 📺 ストリーミングとトレント | オイスターVPN |
| 🏆総合優勝 | オープンVPN |
🏆 WINNER: OPENVPN
OpenVPN wins 5 out of 7 categories.
最適な用途: Remote teams, self-hosted private networks, security-minded power users
OpenVPN takes this one on security, transparency, and cost. It remains a preferred choice in 2026 for its mix of security, flexibility, and compatibility.
Security experts often list it among the safest VPN protocols. It also offers better security than most VPN protocols. Compared with other VPN protocols like PPTP, it’s far stronger. WireGuard still beats it on speed.
OysterVPN earns its spot for a different crowd. It’s a decent VPN for casual VPN users who want one-tap streaming. It just needs an audit and a bigger network to compete with the big names.
Here’s the simple rule. If you’d rather build, pick OpenVPN. If you’d rather buy, pick OysterVPN.
OpenVPNの比較についてさらに詳しく
Most VPN providers bundle OpenVPN into their apps. Here’s how the raw protocol compares with four of them.
OpenVPN vs ノードVPN
OpenVPNが優れている点： $0 self-hosting, full control of logs, site-to-site networking for offices.
NordVPNが優れている点： huge ready-made server fleet, its own faster WireGuard-based protocol, polished streaming apps.
OpenVPNが優れている点： free Community Edition, custom cipher choices, Zero Trust rules for staff.
ExpressVPNが優れている点： OpenVPN comes preconfigured, high speeds out of the box, one-click setup on every device.
OpenVPN vs サーフシャーク
OpenVPNが優れている点： no subscription needed, business remote access, readable source code.
Surfsharkが勝利した点： offers OpenVPN inside a finished app, unlimited device logins, built-in extras like ad blocking.
OpenVPNが優れている点： works on Tomato and Solaris, scripting and plugin support, no vendor lock-in.
CyberGhostが勝利した点： easy toggle to switch to OpenVPN, streaming-labeled servers, beginner-friendly design.
OysterVPNの比較をもっと見る
Here’s how OysterVPN holds up against other VPN services at similar prices.
OysterVPNが優れている点： one-time lifetime deal, simpler settings, lower entry price.
NordVPNが優れている点： audited no-logs claims, far larger server map, a native Linux app.
OysterVPNが優れている点： much cheaper long term, P2P on every server, built-in ad blocker.
ExpressVPNが優れている点： independent audits, better Hulu and Disney+ access, steadier speeds on long routes.
OysterVPN vs プロトンVPN
OysterVPNが優れている点： lifetime payment option, split tunneling on Android, fewer settings to learn.
ProtonVPNが優れている点： a real free plan, open-source apps, Swiss privacy laws.
OysterVPN vs プライベートインターネットアクセス
OysterVPNが優れている点： Irish base outside the Eyes alliances, pay-once pricing, lighter apps.
Private Internet Accessが優れている点： lets you choose your OpenVPN encryption level, Linux app, more locations.
よくある質問
OpenVPN は無料ですか?
Yes. The Community Edition and the Connect client cost nothing. Hosted business plans start at $7/month, and Enterprise uses custom pricing.
VPNとOpenVPNの違いは何ですか？
A VPN is the full service that hides your traffic. OpenVPN is one protocol that builds the encrypted tunnel. Many VPN services, including OysterVPN, use it inside their apps.
OpenVPNは安全に使用できますか？
Yes. It uses SSL/TLS, strong ciphers, and Perfect Forward Secrecy. Its open code gets constant community review. Safety still depends on a correct setup and a trusted server.
Oyster VPNは信頼できるVPNですか？
Yes, it’s a real paid service with working apps and a 30-day refund policy. Its privacy promises, though, have never been independently audited.
Oyster VPNの本社はどこにありますか？
It is based in Ireland. That places it outside the 5/9/14 Eyes intelligence-sharing alliances, which helps its privacy stance.
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