⚡ 簡単な評価:
- 価格: OpenVPN starts free, with Growth at $7/month. FastestVPN starts at $0.83/mo.
- 最適な用途: OpenVPN for teams building their own VPN tunnels. FastestVPN for beginners who want a ready app.
- 主な違い： OpenVPN is a protocol and software you run. FastestVPN is a VPN service that uses OpenVPN inside its apps.
- 私たちのおすすめ： OpenVPN for most tech-savvy users. Its open source code and control win on 安全.
Here’s a twist most comparisons miss.
FastestVPN actually runs OpenVPN inside its own apps.
So this isn’t a normal fight between two VPN services.
OpenVPN is an open source VPN protocol and software you control.
FastestVPN is a VPN provider that hands you servers and a simple app.
Your choice comes down to one question. Build it yourself, or rent it ready-made?
概要
This OpenVPN vs FastestVPN comparison covers security, speed, pricing, and ease of use.
We reviewed documentation, pricing pages, and G2 and Trustpilot reviews for both tools.
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。
最後には、どれがあなたのニーズに合っているかが分かるでしょう。
OpenVPN とは何ですか?
OpenVPN is an open source tunneling protocol for building a virtual private network.
It first launched in 2001.
It builds a secure tunnel between a VPN client and a VPN server.
That tunnel runs on SSL/TLS, the tech behind secure sockets layer encryption.
OpenVPN works by wrapping each データ packet in extra encrypted layers.
The OpenVPN company also sells OpenVPN Access Server and cloud plans for businesses.
You can also use it through any OpenVPN compatible service, like Surfshark or エクスプレスVPN.
In 2026, IT teams still pick it for creating VPN tunnels into private networks.
オープンVPN
Free to start and open source. Built for people who want full control over their VPN tunnels.
OpenVPNの価格設定
Here’s what OpenVPN costs in 2026. The plan list is short.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 無料 | $0 | Community Edition users and home setups |
| 成長 | 月額7ドル | Small teams that need managed リモートアクセス |
| 企業 | カスタム | Large firms with site-to-site networks |
Pricing verified September 2026.
無料トライアル: The Free plan has no time limit. It works as an open-ended trial.
返金保証: No refund window appears on the plan list. Test the Free plan before you pay.
📌 注記： The OpenVPN Community Edition is free software. But you host your own OpenVPN server. That means you pay for the cloud server or hardware.
⚠️ 警告： OpenVPN doesn’t come with a server network. Want an IP address in another country? You need a VPN provider or your own servers abroad.
OpenVPNの主な利点
OpenVPNを検討する価値がある理由は以下のとおりです。
- オープンソースコード： Anyone can inspect the code for flaws. A global developer community reviews it and ships fixes fast.
- Flexible Encryption: It supports AES, Blowfish, and other encryption algorithms. You choose the encryption ciphers and key lengths.
- Firewall Friendly: It passes through firewalls and NAT gateways with ease. That helps on strict ホテル or office networks.
- 完全な前方秘匿性： Fresh encryption keys protect each session. One leaked key doesn’t expose all your past data traffic.
- Scales Up: It handles one remote worker or full site-to-site links. It also supports both IPv4 and IPv6.
- Runs Almost Anywhere: It works on Windows, macOS, Linux, Android, and iOS. It even runs on Tomato routers and Solaris.
- Extendable: Third-party apps, scripts, and plugins can add features. Config files are plain 文章 with a .ovpn extension.
私たちのチームが気づいたこと
私たちの 作家 installed OpenVPN and spent hands-on time with its apps. Here’s what stood out:
OpenVPNのメリットとデメリット
✅ メリット
- Open source code with public community review
- Free Community Edition with no time limit
- AES-256 support with Perfect Forward Secrecy
- Works through strict firewalls and NAT
- Runs on nearly every operating system
❌ デメリット
- Slower than the newer WireGuard protocol
- 手動設定は初心者には難しい
- No built-in server network or location switching
- Less user-friendly on mobile デバイス than desktop
FastestVPNとは何ですか？
FastestVPN is a budget VPN service with its own apps and servers.
It’s based in the Cayman Islands.
That country has no mandatory data retention laws.
It also sits outside international surveillance alliances.
The server network is small, with around 800 servers in 49 countries.
ノードVPN and ExpressVPN each run thousands.
Its main draw is price, including a lifetime plan few rivals offer.
最速VPN
A simple VPN app with an ad blocker, a kill switch, and ten device slots. Good for budget streaming and daily privacy.
FastestVPNの料金
Here’s what a FastestVPN subscription costs in 2026. All plans include the same security features.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 1年間＋1年間無料 | 月額0.83ドル | Budget users who want the lowest monthly rate |
| 1ヶ月プラン | 月額5ドル | Short trips or a quick test |
| 限定生涯プラン | $40 | One payment with no renewals |
Pricing verified September 2026.
無料トライアル: There’s no free plan. Tom’s Guide notes a 7-day trial, but it isn’t free.
返金保証: Every plan comes with a 31 day money back guarantee.
📌 注記： Add-ons cost extra. A dedicated IP address is $1.49/month. It keeps the same VPN IP address every session. Extra connections cost $4 each per month.
⚠️ Price check: Some review sites list the annual plan at $19.95, about $1.66/month. The current 1 Year + 1 Year Free deal works out to $0.83/mo. Confirm the total at checkout.
FastestVPNの主なメリット
FastestVPNを検討する価値がある理由は以下のとおりです。
- Lifetime Option: One payment covers you with no yearly renewals. Very few VPN providers sell this.
- 監査済みのプライバシー： Altius IT audited its no logs policy. The audit confirmed it doesn’t store activity or connection logs.
- 10台のデバイスを同時に接続可能： One account covers up to 10 simultaneous connections. That’s enough for a whole family.
- Built-in Protection: FastestVPN offers an ad blocker, malware protection, and a NAT firewall. The firewall blocks unwanted incoming traffic.
- ストリーミングタブ： The app has a dedicated tab for streaming servers. It points you to the right server for each channel.
- スプリットトンネリング: You pick which apps use the VPN. Everything else stays on your normal internet connection.
- Beginner-Friendly Apps: The Windows and マック apps are clean and simple. The mobile apps look and work the same way.
私たちのチームが気づいたこと
Our writer signed up for FastestVPN and spent time with its apps. Here’s what stood out:
FastestVPNのメリットとデメリット
✅ メリット
- Rare lifetime plan with no renewals
- No logs policy confirmed by a third-party audit
- 最大10台のデバイスを同時に接続可能
- Built-in ad blocker and NAT firewall
❌ デメリット
- Small server network of about 800 servers
- Speeds drop sharply on long-distance servers
- Windows上でDNSとIPの漏洩が報告されている
- Inconsistent results with some Netflix libraries
機能比較
OpenVPN and FastestVPN overlap in some areas, but not all. Below, we compare nine key features, plus pricing.
| 特徴 | オープンVPN | 最速VPN |
|---|---|---|
| 開始価格 | 0ドル（無料プラン） | 月額0.83ドル |
| 無料プラン | ✅ | ❌ |
| Open Source Code | ✅ | ❌ |
| 内蔵サーバーネットワーク | ❌（自己ホスティング） | ✅ ~800 servers, 49 countries |
| TCP and UDP Modes | ✅ | ✅ (via OpenVPN) |
| WireGuardサポート | ❌ | ✅ |
| 広告ブロッカー | ❌ | ✅ |
| サイト間ネットワーク | ✅ | ❌ |
| 生涯プラン | ❌ | ✅ |
| 最適な用途 | IT teams and self-hosters | Budget home users |
1. セキュリティと暗号化
オープンVPN: OpenVPN uses the OpenSSL library for encryption. It supports AES, Blowfish, and other encryption protocols. Admins pick the cipher and key length, and those choices set the final strength.
It runs a custom security protocol built on SSL/TLS. It checks both sides before any data moves. The authentication OpenVPN relies on combines passwords with digital certificates from a public key infrastructure.
最速VPN: FastestVPN uses AES-256 encryption on every connection. It adds DNS leak protection and a NAT firewall on top. Its malware blocker helps, but it doesn’t replace antivirus software.
⚠️ 警告： Strong encryption can’t fix a weak setup. A badly configured OpenVPN server can be less safe than a well-run commercial app.
2. VPN Protocols: TCP, UDP, and WireGuard
オープンVPN: OpenVPN runs over two transport modes. UDP, the user datagram protocol, is faster but doesn’t guarantee delivery. TCP, the transmission control protocol, delivers packets in order but runs slower.
OpenVPN UDP suits streaming and calls. OpenVPN TCP suits shaky or filtered networks. It’s slower than WireGuard, a newer rival among tunneling protocols. Some security writers still prefer OpenVPN for its flexibility.
Security guides rate it above most VPN protocols, including old PPTP. Most VPN providers support it too. A TLS auth key adds an HMAC firewall. It uses a hash message authentication code to drop unsigned packets.
最速VPN: FastestVPN lets you pick the WireGuard protocol, OpenVPN, and other VPN protocols. Pick OpenVPN TCP on strict networks. Pick WireGuard when speed matters most.
💡 プロのヒント: Try the UDP protocol first. Switch to TCP only if your connection keeps dropping.
3. Remote Access & Business Networking
オープンVPN: This is where OpenVPN shines. OpenVPN Access Server lets remote workers reach company files safely. It scales from one employee to full office-to-office links.
Site-to-site networking connects whole offices through one encrypted link.
最速VPN: FastestVPN is built for personal privacy, not company networks. It has no remote access gateway or site-to-site tools. Businesses should look elsewhere.
4. Device Compatibility & Setup
オープンVPN: OpenVPN runs on all major operating systems, plus Tomato and Solaris. It can also secure IoT devices like cameras and sensors. To install OpenVPN on Windows, you use the OpenVPN GUI or OpenVPN Connect.
OpenVPN Connect is free client software. Many other VPN clients can also read .ovpn files.
最速VPN: FastestVPN’s apps cover Windows, Mac, Android, iOS, and Linux. You install FastestVPN, log in, and tap connect. Devices like Apple TV may need a router setup.
The Windows app and the FastestVPN iOS app share one clean layout. Android users get the same streaming tab and kill switch.
5. Leak Protection & Kill Switch
オープンVPN: OpenVPN’s cloud DNS security can block bad domains before they load. On personal OpenVPN connections, leak protection depends on your client settings. You control how DNS requests leave the tunnel.
最速VPN: FastestVPN includes a kill switch that cuts your internet if the VPN connection drops. DNS leak protection sends DNS queries through its own servers.
The kill switch is your backup if the tunnel fails. It stops data leaks before they happen.
⚠️ 警告： Reviewers who tested FastestVPN on a Windows computer found DNS leaks and exposed IP addresses. Others questioned how well the kill switch works. Run your own DNS leak tests after setup.
6. Split Tunneling & App Access
オープンVPN: OpenVPN’s cloud plans can lock down access to SaaS apps. Admins decide who reaches which cloud tool. Split tunneling lives in the config file, not behind a simple toggle.
SaaS protection also shows who touches each cloud app.
最速VPN: Smart tunneling is FastestVPN’s name for split tunneling. You choose which apps use the VPN tunnel. Its browser extensions only cover browser traffic, not your whole device.
7. 同時接続
オープンVPN: Self-hosted OpenVPN has no fixed cap on VPN connections. Your server hardware sets the real limit. Paid plans are priced for 仕事 teams instead.
最速VPN: One account supports up to 10 simultaneous device connections. You can buy extra slots as an add-on.
8. Speed & Streaming
オープンVPN: Speed depends on your OpenVPN servers, your base internet, and TCP versus UDP. On its own, it can’t unblock streaming sites. You’d need servers in other countries.
最速VPN: Reviewers testing FastestVPN found downloads drop about 45% on average. One test hit around 730 Mbps on a nearby server using WireGuard. Long-distance servers lost up to 55% of their speed.
Upload speeds slowed about 22% in one test. Ping rose 33% on one of two computers. A slow base connection means slow VPN speeds too.
With so few servers, peak times can crowd FastestVPN’s servers and cause slow speeds. Torrenting works on all FastestVPN servers, but it’s not quick.
Is streaming FastestVPN’s strong suit? Mostly. It works with streaming services like Netflix, Disney+, BBC iPlayer, Hotstar, Prime Video, and Hulu. Its streaming servers unblocked US, UK, Japan, and Sweden Netflix libraries.
⚠️ 警告： The name suggests the fastest VPN, but FastestVPN claims don’t match independent tests. The US Netflix library loaded slowly, and the Australian library didn’t work.
9. カスタマーサポート
オープンVPN: OpenVPN offers documentation, community forums, and ticket support on 仕事 plans. G2 reviews of OpenVPN Access Server often praise its technical support.
最速VPN: FastestVPN offers 24/7 live chat with real people, plus email support. Replies come fast but can feel generic. The knowledge base has setup guides, though its search is weak.
✅ Good sign: Positive Trustpilot reviews often mention FastestVPN’s customer support by name. Still, some users found support unhelpful on tricky issues.
10. 価格設定とコスト
Here are the plans side by side.
| プランの種類 | オープンVPN | 最速VPN |
|---|---|---|
| 無料 | 無料：0ドル | ❌ |
| 毎月 | Growth: $7/month | 1 Month Plan: $5/mo |
| 最高の価値 | — | 1 Year + 1 Year Free: $0.83/mo |
| One-Time | ❌ | Exclusive Lifetime Plan: $40 |
| 仕事 | エンタープライズ：カスタム | ❌ |
オープンVPN: The free tier is real, but running it isn’t free. You still pay for a VPN server, cloud hosting, or hardware. Growth suits small teams that want managed access.
最速VPN: FastestVPN is the cheaper path for one person who wants servers ready to go. The lifetime plan beats years of monthly billing. Watch add-on costs like dedicated IPs.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| A cheap VPN with no setup | 最速VPN | Low plans and ready servers |
| Remote access for a team | オープンVPN | Access Server and site-to-site tools |
| Full control over security | オープンVPN | Open source, custom ciphers |
| Streaming Netflix or BBC iPlayer | 最速VPN | 専用ストリーミングサーバー |
| 多数のサーバー設置場所 | 最速VPN | 49 countries built in |
| The easiest setup | 最速VPN | One-tap apps for beginners |
💰 あなたの予算
FastestVPN costs less for one person who just wants privacy. OpenVPN software is free, but hosting servers adds real cost.
🔌 あなたの技術スタック
Already run Linux servers or company firewalls? OpenVPN plugs into scripts, plugins, and existing gear.
🎯 あなたの主な目標
FastestVPN hides your IP address from your internet service provider right away. OpenVPN is built for reaching office files and private servers from anywhere.
🎓 あなたの経験レベル
Most VPN users can set up FastestVPN in minutes. OpenVPN rewards people who are comfortable with config files and certificates.
🆓 無料トライアルとデモ
Try the free OpenVPN Community Edition if you’re curious. FastestVPN has no free plan, but its 31-day refund window lowers the risk.
🛟 サポートオプション
FastestVPN gives you 24/7 live chat for quick questions. OpenVPN leans on docs and forums unless you pay for a business plan.
🔒 データプライバシーとセキュリティ
OpenVPN keeps logs on hardware you own, so you decide what’s stored. FastestVPN relies on its audited no-logs promise and offshore base.
切り替えガイド
既にこれらのツールのいずれかをご利用ですか？切り替える場合、どのような変更が予想されますか？
🔄 Switching from OpenVPN to FastestVPN?
✅ 得られるもの：
- Ready-made servers in 49 countries
- Streaming servers and a built-in ad blocker
- 24時間年中無休のライブチャットサポート
❌ 失うもの：
- Full control over encryption settings
- Site-to-site links and remote access to private networks
- Open source code you can inspect
📋切り替え方法：
- Save any .ovpn profiles you still need for work.
- Buy a FastestVPN plan and install the app on each device.
- Pick OpenVPN or WireGuard in settings, then connect.
🔄 Switching from FastestVPN to OpenVPN?
✅ 得られるもの：
- オープンソースの透明性
- Custom ciphers and authentication rules
- Remote access and IoT security tools
❌ 失うもの：
- One-tap server switching
- FastestVPN’s ad blocker and NAT firewall
- 生涯価格
📋切り替え方法：
- Cancel or let your FastestVPN plan expire.
- Set up the Community Edition or Access Server on a server.
- Import .ovpn profiles 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 home users and small teams. We didn’t run OpenVPN Access Server at enterprise scale. We also didn’t review port forwarding or double VPN servers. Nor did we check which server locations are virtual servers.
We didn’t check every Netflix library FastestVPN supports. Our notes reflect the September 2026 versions of both tools. Features may change after that.
We also skipped FastestPass, the company’s separate パスワードマネージャー. Our full FastestVPNのレビュー goes deeper on apps and speed.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰価格 | 最速VPN |
| 🔒 Security & Transparency | オープンVPN |
| 🛠️ カスタマイズ | オープンVPN |
| 🏢 リモートアクセス | オープンVPN |
| 🔌 デバイス互換性 | オープンVPN |
| 👶 使いやすさ | 最速VPN |
| 📺 ストリーミング配信 | 最速VPN |
| 🏆総合優勝 | オープンVPN |
🏆 WINNER: OPENVPN
OpenVPN wins 4 out of 7 categories.
最適な用途: IT teams, self-hosters, remote access, and custom security setups
OpenVPN and FastestVPN solve different problems. Both build virtual private networks, just in different ways. OpenVPN is one engine. FastestVPN is one car that uses it.
OpenVPN takes the win for security, control, and business remote access. Its open source code and flexible settings are hard to match. That’s why it holds a 4.3 rating to FastestVPN’s 3.8.
FastestVPN is the better buy if you just want a cheap app. It covers the core VPN features most people need. You get streaming, an ad blocker, and servers in minutes.
Not sure yet? Start with the free OpenVPN Community Edition. If setup feels like too much, FastestVPN’s refund window keeps your risk low.
OpenVPNの比較についてさらに詳しく
Here’s how OpenVPN stacks up against other options:
OpenVPNが優れている点： Free self-hosted option, open source code you can audit, and site-to-site networking.
NordVPNが優れている点： Thousands of ready servers, faster WireGuard-based speeds, and one-click apps for beginners.
OpenVPNが優れている点： No subscription needed, custom cipher control, and business remote access.
ExpressVPNが優れている点： OpenVPN comes pre-configured, faster everyday speeds, and wide streaming support.
OpenVPN vs サーフシャーク
OpenVPNが優れている点： Self-hosting, IoT and SaaS protection, and full config control.
Surfsharkが勝利した点： Unlimited device connections, OpenVPN offered as a built-in tunneling protocol, and ad blocking.
OpenVPN vs サイバーゴースト
OpenVPNが優れている点： Open source transparency, site-to-site links, and a free tier with no monthly fee.
CyberGhostが勝利した点： An easy interface for switching to OpenVPN, streaming-labeled servers, and a simple setup.
FastestVPNの比較をもっと見る
Here’s how FastestVPN stacks up against other options:
FastestVPNが勝利した点： A lifetime plan, lower long-term cost, and a simpler app with fewer menus.
NordVPNが優れている点： Thousands of servers, faster long-distance speeds, and steadier Netflix unblocking.
FastestVPNが勝利した点： Far lower prices, a built-in ad blocker, and a one-time payment option.
ExpressVPNが優れている点： A much larger server list, stronger speed results, and broader streaming support.
FastestVPN vs プライベートインターネットアクセス
FastestVPNが勝利した点： A lifetime option, an offshore base with no data retention laws, and a simpler interface.
Private Internet Accessが優れている点： A far bigger network, a choice of encryption level with OpenVPN, and unlimited device connections.
FastestVPNが勝利した点： Lifetime pricing, a dedicated streaming tab, and lower paid plans.
プロトンVPN 勝利したタイトル： A free plan with no data cap, open source apps, and Secure Core routing.
よくある質問
OpenVPN は無料ですか?
Yes. The Community Edition and the OpenVPN Connect client are free. Business plans start at $7/month, and you still pay for any server you host.
OpenVPNは安全に使用できますか？
Yes. It uses SSL/TLS, strong encryption, and Perfect Forward Secrecy. Its open source code gets constant public review. Safety still depends on correct configuration.
VPNとOpenVPNの違いは何ですか？
A VPN is a service or network. OpenVPN is a protocol and software used to build one. Many VPN services run OpenVPN inside their apps.
FastestVPNは利用する価値があるのか？
For budget users, yes. You get audited no-logs privacy, 10 device connections, and a lifetime option. Expect a small network and slower long-distance speeds.
FastestVPN は Netflix で使えますか?
Mostly. Reviewers unblocked US, UK, Japan, and Sweden libraries. The US library loaded slowly, and the Australian library didn’t work at all.
English 
Spanish 
Chinese 
German 
French 
Arabic 
Russian 
Portuguese 
Japanese 
Korean 
Italian 
Turkish 
Dutch 
Polish 
Indonesian 
Thai 
Vietnamese 