⚡ 簡単な評価:
- 価格: OpenVPN has a free tier and a Growth plan at $7/month. AdGuard VPN starts at $2.40/month on a 2-year plan.
- 最適な用途: OpenVPN for teams and tech users who want control. AdGuard VPN for beginners who want ads gone.
- 主な違い： OpenVPN is an open source VPN protocol plus 仕事 software. AdGuard VPN is a consumer app with a proprietary protocol.
- 私たちのおすすめ： OpenVPN for most users. Its code is public, and the free edition has no time limit.
OpenVPN and AdGuard VPN both promise secure connections.
But they aren’t really the same kind of product.
OpenVPN is a tunneling protocol that powers many virtual private networks.
AdGuard VPN is a consumer app built by an ad blocker company.
One gives you control. The other gives you convenience.
The best VPN for you depends on how much setup you can handle.
概要
This OpenVPN vs AdGuard VPN comparison covers 安全, speed, privacy, pricing, and ease of use.
We reviewed documentation, pricing pages, and independent 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。
この記事を読み終える頃には、あなたのニーズに合ったVPNサービスがどれなのかが分かるでしょう。
OpenVPN とは何ですか?
OpenVPN is an open source VPN protocol first released in 2001.
It builds a secure tunnel that carries データ traffic between two points.
The name also belongs to OpenVPN Inc., the OpenVPN company once called OpenVPN Technologies.
That company sells OpenVPN software like Access Server and a cloud remote access service.
The free OpenVPN Community Edition lets anyone run their own OpenVPN server.
Most VPN providers still offer it inside their apps.
In 2026, it’s still a go-to pick for online security and flexibility.
The review below shows how OpenVPN works in practice.
🏆 Winner: OpenVPN
Open source security you can inspect yourself. Pick UDP for speed or TCP for reliability. A strong fit for teams that need remote access.
OpenVPNの価格設定
Here’s what OpenVPN costs in 2026. The plans scale with your team.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 無料 | $0 | Testing and small personal setups |
| 成長 | 月額7ドル | Small teams that want managed remote access |
| 企業 | カスタム | Large organizations with strict compliance needs |
Pricing verified September 2026.
無料トライアル: Yes. The free tier and the Community Edition let you test with no time limit.
返金保証: Refund terms vary by product. Check them at checkout before you upgrade.
📌 注記： OpenVPN free really means free if you self-host. You only pay for your own server. The catch: you get just a few server locations, the ones you run. The OpenVPN Connect client software costs nothing too.
⚠️ 警告： Business plans are priced by the number of OpenVPN connections. Costs climb as more VPN connections join your network.
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 pick the encryption ciphers and the length of your encryption keys.
- TCP or UDP Choice: OpenVPN UDP favors speed. OpenVPN TCP favors complete, in-order delivery.
- Firewall Friendly: It passes through firewalls and NAT gateways well. That helps on strict office or ホテル ネットワーク。
- 幅広い互換性: It runs on most operating systems, from Windows to iOS. It even works on Tomato and Solaris.
- 成長の余地： It scales from one laptop to full site-to-site networks. It also handles IPv4 and IPv6 traffic.
私たちのチームが気づいたこと
私たちの 作家 installed OpenVPN Connect and explored the free tier. 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 anyone can inspect
- Free Community Edition with no time limit
- Windows、macOS、Linuxで動作します。 アンドロイド、iOS
- Strong encryption with Perfect Forward Secrecy
- Gets past 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
- Manual configuration takes technical skill
- Less user-friendly on mobile than on desktop
- No built-in ad blocking
AdGuard VPNとは何ですか？
AdGuard VPN is a VPN service from the team behind the AdGuard ad blocker.
It hides your real location by sending traffic through a remote server.
That server gives you a different IP address while the app encrypts your traffic.
The network has 800+ servers in 65 locations across 53 countries.
It uses its own proprietary protocol instead of OpenVPN or WireGuard.
AdGuard puts ad and tracker blocking right next to the VPN.
That combo is the main reason people choose it.
Watch our AdGuard VPN review for a quick tour.
🥈 Runner Up: AdGuard VPN
A simple VPN with ad blocking built in. Start on the free plan with 3 GB each month. AdGuard VPN’s apps cover phones, desktops, and Android TV.
AdGuard VPNの価格
An AdGuard VPN subscription gets cheaper the longer you commit. Here’s the breakdown.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 1ヶ月 | 月額11.99ドル | Short trips or trying paid features |
| 1年 | 月額3.99ドル | Regular users who want a lower rate |
| 2年 | 月額2.40ドル | 予算が限られている長期ユーザー |
Pricing verified September 2026.
無料トライアル: The free version gives you 3 GB of data every month. Speeds are capped at 20 Mbps.
返金保証: The yearly and 2-year plans come with a 30-day money back guarantee.
📌 注記： The yearly plan is billed at $47.88 up front. You can pay by credit card, PayPal, or 暗号.
⚠️ Price check: Some review sites list the 2-year plan at $119 up front. Confirm the final price at checkout.
AdGuard VPNの主なメリット
Here’s what makes AdGuard VPN worth a look:
- Ad Blocking Built In: Pick AdGuard DNS servers to block ads and trackers. In the desktop apps, integrated mode links the VPN with the AdGuard ad blocker.
- 無料プラン: You get 3 GB every month at no cost. That’s enough to test the apps risk free.
- 10台のデバイス： Paid plans allow up to 10 simultaneous connections. That covers most households.
- キルスイッチ: It cuts your internet if the VPN drops. Your real IP stays hidden.
- スプリットトンネリング: Choose which apps or certain websites skip the VPN. Your banking app can run outside it.
- Cyprus Headquarters: AdGuard Software Limited is based in Cyprus. That’s outside the 5/9/14 Eyes and under GDPR.
- Censorship Resistance: The protocol disguises VPN traffic as normal HTTPS. That helps on restrictive networks.
私たちのチームが気づいたこと
Our writer signed up for AdGuard VPN and started on the free plan. Here’s what stood out:
AdGuard VPNのメリットとデメリット
✅ メリット
- Ad and tracker blocking through DNS
- Free plan with 3 GB of data each month
- Up to 10 devices on paid plans
- Kill switch and split tunneling included
- Based in Cyprus, outside the 14 Eyes
❌ デメリット
- No OpenVPN or WireGuard support
- 第三者なし 監査 of its claims
- 遠隔地のサーバーでは速度が急激に低下する
- No 24/7 customer support
機能比較
Let’s put OpenVPN vs AdGuard VPN side by side. We’ll cover nine key areas, then finish with pricing.
| 特徴 | オープンVPN | アドガードVPN |
|---|---|---|
| 開始価格 | $0 (paid from $7/month) | 月額2.40ドル |
| 無料プラン | ✅ | ✅（月間3GB） |
| Open Source Code | ✅ | ❌ |
| TCP & UDP Modes | ✅ | ❌ |
| Ad & Tracker Blocking | ❌ | ✅ |
| スプリットトンネリング | ✅ | ✅ |
| サイト間ネットワーク | ✅ | ❌ |
| Third-Party Code Review | ✅ | ❌ |
| 最適な用途 | Tech users and teams | Beginners who hate ads |
1. Tunneling Protocol & Encryption
オープンVPN: The OpenVPN protocol runs a custom security protocol built on SSL/TLS. That’s the secure sockets layer family. It pulls its crypto from the OpenSSL library. The two-way authentication OpenVPN runs relies on a public key infrastructure and certificates. Perfect Forward Secrecy means one leaked key can’t unlock every past session.
アドガードVPN: The AdGuard VPN protocol is proprietary and uses AES-256 encryption. It makes VPN traffic look like regular HTTPS to slip past censorship. But nobody outside AdGuard has audited it. That raises real transparency questions.
⚠️ 警告： AdGuard VPN doesn’t support OpenVPN or WireGuard. You can’t switch to a protocol you trust more.
OpenVPN also adds an extra lock called TLS auth. It signs every handshake packet with a hash message authentication code. This HMAC firewall drops fake packets before they touch the server.
That’s why security experts list OpenVPN with the safest VPN protocols. It beats older encryption protocols like PPTP and offers better security than most VPN protocols. Some even prefer the open source OpenVPN protocol over WireGuard for its flexibility. Other VPN protocols may be faster, but few get checked this hard.
2. スピードとパフォーマンス
オープンVPN: OpenVPN UDP uses the user datagram protocol. It skips delivery checks, so it’s faster but less reliable. OpenVPN TCP uses the transmission control protocol, which confirms every packet arrives in order. It’s steadier but slower. Newer tunneling protocols like WireGuard are faster. Still, it handles browsing and video calls fine.
アドガードVPN: AdGuard VPN’s performance is fine for everyday browsing on nearby servers, with drops around 20%. Long-distance links hurt more. Reviewers who tested AdGuard VPN saw connection speeds drop from 65 to about 10 Mbps. Paid users fare better, with one test averaging 58.73 Mbps. Some users also report connection drops.
⚠️ 警告： Slow speeds hurt online gaming and data intensive tasks. Run speed tests on a US server first. Check upload speed before you buy AdGuard VPN.
3. Ad & Tracker Blocking
オープンVPN: The protocol itself has no ad blocker. Business plans add DNS filtering, but that targets threats, not pop-up ads. To block ads, you’ll need a separate tool.
アドガードVPN: This is where AdGuard shines. Can AdGuard VPN block ads on its own? Yes, once you choose its filtering DNS. Blocking ads this way also speeds up page loads on heavy sites.
4. DNS Security & Content Filtering
オープンVPN: OpenVPN’s cloud service filters DNS and blocks malicious domains before they load. Admins set one rule set for the whole team. That keeps sensitive data safer on every device.
アドガードVPN: You can pick a DNS server that filters ads, trackers, and shady sites. It’s personal filtering, not team-wide policy. Home users win here. IT teams get little control.
5. Remote Access & Zero Trust
オープンVPN: Remote access is OpenVPN’s home turf. Companies use it so staff can reach private networks from anywhere. OpenVPN Access Server adds user rules and zero trust checks on top.
アドガードVPN: AdGuard connects you to its own VPN servers, not your office network. You can’t reach a private company system through it. It’s built for personal online privacy instead.
Here’s how OpenVPN applies zero trust rules to each user.
6. Site-to-Site & IoT Networking
オープンVPN: OpenVPN links whole offices together by creating VPN tunnels between sites. It also secures IoT gear like sensors and cameras. The same tool scales from one user to large organizations.
アドガードVPN: There’s no site-to-site option here. It protects individual devices only, up to 10 per plan. That works for families, but it lacks all the features branch offices need.
The IoT side of OpenVPN looks like this.
7. SaaS Access & Protection
オープンVPN: OpenVPN can put SaaS apps behind the VPN connection. It shows who touches which cloud app and blocks the rest. That helps IT teams stop data leaks.
アドガードVPN: AdGuard doesn’t manage app access. Every site gets the same treatment, apart from your split tunneling list. Think of it as a privacy tool, not an access gate.
And here’s OpenVPN’s SaaS protection view in action.
8. Privacy, Logging & Trust
オープンVPN: Open code means anyone can hunt for backdoors. Privacy depends on who runs the OpenVPN servers: you, your employer, or a VPN provider. Self-host it, and no third party sees your logs. The tunnel also hides your browsing from your internet service provider.
アドガードVPN: It has a strict no logs policy. It skips IP addresses, browsing history, and connection timestamps. It collects minimal technical data to fix bugs and shares nothing with third parties. Still, no audit has confirmed any of this.
AdGuard offers Temp Mail too, for extra privacy when you sign up for things.
💡 プロのヒント: Audits matter. Until AdGuard publishes one, treat its privacy promises as unverified security measures.
9. Apps, Devices & Ease of Use
オープンVPN: OpenVPN Connect is the official OpenVPN client. On a Windows PC, the OpenVPN GUI is another option. Connections run from .ovpn 文章 files you can edit or load into other VPN clients. You can install OpenVPN on unlimited devices, but manual setup takes skill. It also feels less smooth on mobile devices than on desktops.
アドガードVPN: AdGuard has easy to use apps for Windows, macOS, Linux, Android, iOS, and Android TV. Browser extensions cover Chrome, Firefox, and Edge. Setup takes minutes, with no config files. The Windows version also supports integrated mode.
10. 価格設定とコスト
プランを並べて比較してみましょう。
| プラン | オープンVPN | アドガードVPN |
|---|---|---|
| 無料 | 無料：0ドル | Free version (3 GB/month) |
| 入場料支払い済み | Growth: $7/month | 1 Month: $11.99/month |
| 1-Year Term | — | 1 Year: $3.99/month |
| 2-Year Term | — | 2 Years: $2.40/month |
| 企業 | エンタープライズ：カスタム | — |
オープンVPN: It’s cheapest if you can self-host the Community Edition. The Growth plan suits small teams that want everything managed. Bigger companies get custom quotes.
アドガードVPN: It’s the cheaper consumer VPN over two years. The monthly plan is steep, so commit longer if you’ll stay. Light users can stick with the free tier.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| Remote access for a team | オープンVPN | Access Server and zero trust tools |
| Ads blocked while you ブラウズ | アドガードVPN | Built-in DNS ad filtering |
| Full control over settings | オープンVPN | Open code and custom ciphers |
| Easy setup as a beginner | アドガードVPN | Simple apps, no config files |
| Ready-made streaming servers | アドガードVPN | NetflixとDisney+のブロックを解除します |
| Maximum transparency | オープンVPN | Public code anyone can audit |
💰 あなたの予算
If you can run a server, OpenVPN costs you nothing but hosting. If you want zero setup, AdGuard’s longer plans are the cheaper path.
🔌 あなたの技術スタック
OpenVPN plugs into company networks, SaaS tools, and third-party apps, scripts, and plugins. AdGuard VPN fits a personal setup, especially alongside other AdGuard products.
🎮 Your Daily Use
AdGuard unblocks BBC iPlayer and Netflix but struggles with Amazon Prime and Peacock. Some streaming platforms may also buffer. For gaming, OpenVPN over the UDP protocol on a nearby server is the smoother bet.
🎓 あなたの経験レベル
Most VPN users will find AdGuard simpler from day one. OpenVPN rewards people who are comfortable with config files and certificates.
✈️ 旅行 and Censorship
AdGuard VPN struggles with China’s Great Firewall, unlike エクスプレスVPN or NordVPN. OpenVPN gets past firewalls well, but only if your provider’s servers aren’t blocked.
🆓 無料トライアルとデモ
Try OpenVPN’s free tier and AdGuard’s 3 GB plan side by side. Both let you test before spending anything.
🛟 サポートオプション
AdGuard has no 24/7 live chat. You file through a ticketing system and wait for the support team. OpenVPN offers paid support, while free users lean on community forums.
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 AdGuard VPN?
✅ 得られるもの：
- 広告とトラッカーをブロックする機能が内蔵されています。
- One-tap mobile apps with no config files
- Ready-made servers in 65 locations
❌ 失うもの：
- Open, auditable code
- The choice between TCP and UDP
- Business tools like site-to-site and zero trust
📋切り替え方法：
- Back up your .ovpn profiles in case you return.
- Create an AdGuard account and pick a plan.
- Install the AdGuard VPN app and turn on DNS filtering.
🔄 Switching from AdGuard VPN to OpenVPN?
✅ 得られるもの：
- A transparent, open protocol
- Full control over ciphers and key lengths
- Remote access to private company networks
❌ 失うもの：
- DNS-based ad blocking
- Beginner-friendly, one-tap setup
- Integration with the AdGuard ad blocker
📋切り替え方法：
- Cancel AdGuard within 30 days if your plan qualifies for a refund.
- Sign up for OpenVPN’s free tier or any OpenVPN compatible service, like プライベートインターネットアクセス.
- Install OpenVPN Connect, import your profile, and connect.
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 run our own speed tests across countries. We also didn’t test OpenVPN at large enterprise scale or AdGuard inside China. Our notes reflect September 2026 versions, so features may change.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰料金プランと無料プラン | オープンVPN |
| 🔐 セキュリティと暗号化 | オープンVPN |
| ⚡ スピードとパフォーマンス | オープンVPN |
| 🕵️ Privacy & Transparency | オープンVPN |
| 🏢 Business Networking | オープンVPN |
| 🚫 Ad & Tracker Blocking | アドガードVPN |
| 👶 使いやすさ | アドガードVPN |
| 🌍 Streaming & Server Network | アドガードVPN |
| 🏆総合優勝 | オープンVPN |
🏆 WINNER: OPENVPN
OpenVPN wins 5 out of 8 categories.
最適な用途: Remote teams, privacy-minded tech users, custom VPN setups
These two tools solve different problems. OpenVPN is one part transparent protocol, one part business platform for secure connections. AdGuard VPN is a simple consumer VPN with ad blocking baked in.
AdGuard is a fair pick if you want fewer ads and no setup. Next to premium VPNs, though, it falls short. Missing audits, slow long-distance speeds, and no OpenVPN support hold it back.
If you value control, open code, and room to grow, OpenVPN is the better choice. Start on the free tier and upgrade only when your team needs it.
OpenVPNの比較についてさらに詳しく
Here’s how OpenVPN stacks up against other VPN services:
OpenVPNが優れている点： code you can audit yourself, a free self-hosted edition, and site-to-site links for offices.
ノードVPN 勝利したタイトル： a huge ready-made server list, one-tap apps, and faster WireGuard-based speeds.
OpenVPNが優れている点： zero license cost, full cipher control, and access to private company systems.
ExpressVPNが優れている点： OpenVPN pre-configured in its apps, round-the-clock live chat, and wider streaming access.
OpenVPN vs サーフシャーク
OpenVPNが優れている点： office remote access, zero trust controls, and no subscription for self-hosters.
Surfsharkが勝利した点： unlimited devices, OpenVPN plus WireGuard in one app, and a built-in ad blocker.
OpenVPN vs サイバーゴースト
OpenVPNが優れている点： self-hosting, SaaS protection for teams, and editable config files.
CyberGhostが勝利した点： an easy toggle to switch into OpenVPN, streaming-focused servers, and beginner-friendly apps.
AdGuard VPNの比較
Here’s how AdGuard VPN compares with other VPN providers:
AdGuard VPNが優れている点： a free plan, DNS-level ad filtering, and a lower 2-year rate.
NordVPNが優れている点： OpenVPN and WireGuard support, more servers, 24/7 help, and better results in China.
AdGuard VPN vs Surfshark
AdGuard VPNが優れている点： a free 3 GB tier, integrated mode with its ad blocker, and extras like Temp Mail.
Surfsharkが勝利した点： unlimited devices, audited no-logs claims, and faster speeds overall.
AdGuard VPN vs プロトンVPN
AdGuard VPNが優れている点： ad blocking as a core feature, a cheaper long plan, and a 10-device limit on paid plans.
ProtonVPNが優れている点： unlimited free data, open source apps with public audits, and Swiss privacy laws.
AdGuard VPNとPrivate Internet Accessの比較
AdGuard VPNが優れている点： a free plan, a simpler interface, and a Cyprus base outside the 14 Eyes.
PIAが勝利した点： unlimited devices, OpenVPN with a choice of encryption levels, and audited no-logs claims.
よくある質問
OpenVPN は無料ですか?
Yes. The Community Edition and the Connect app cost nothing. Paid business plans start at $7/month for managed features and more connections.
OpenVPNは安全に使用できますか？
Yes. Its open code gets constant public review. It also supports strong encryption with Perfect Forward Secrecy. Keep your software updated to stay protected.
OpenVPNのデメリットは何ですか？
It’s slower than WireGuard and tricky to set up by hand. Mobile setup feels clunky, and there’s no built-in ad blocking.
AdGuard VPNは無料ですか？
Partly. The free plan gives you 3 GB of data each month at capped speeds. Unlimited paid plans start at $2.40/month on a 2-year term.
AdGuard VPN は安全に使用できますか?
It’s safe for everyday browsing. It uses AES-256 encryption, a kill switch, and a no-logs policy. But its protocol hasn’t been independently audited yet.
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