📊 当社のテスト結果：
- 📧 メール配信率： Instantly leverages a 1.5M+ user deliverability network to keep emails out of the spam folder — 即座に勝利
- 💰 価格: Instantly’s growth plan starts at $30/month flat vs Zendesk’s pricing at $55/agent/month — 即座に勝利
- 🎯 リードジェネレーション: 即座にリードを見つける offers 160M+ verified leads; Zendesk has no B2B lead database — 即座に勝利
- 🎫 サポートチケット: Zendesk’s customer support software handles support requests across multiple channels — Zendeskが勝利
- 🔌 統合: Zendesk marketplace offers 1,300+ apps and integrations like Salesforce vs Instantly’s third-party ザピエール 統合 - Zendeskが勝利
Choosing between Zendesk and Instantly comes down to one big 質問.
Do you need customer support software for managing support tickets? Or do you need a sales engagement tool for cold email アウトリーチ?
Zendesk is built for support teams handling customer interactions across multiple channels. Instantly AI is built for sales teams running cold email campaigns at scale.
I tested both platforms for three weeks. I wanted to make an informed decision about which tool delivers more value for businesses in 2026.
Here’s everything you need to pick the best tool for your team.
概要
To give you the most accurate comparison, I tested Zendesk vs Instantly side by side.
I ran outreach campaigns through Instantly and managed real customer conversations inside Zendesk Suite.
I checked email deliverability, the agent workspace, custom workflows, ticket systems, 安全, and total cost.
These two desk software and cold outreach tools serve very different jobs. But many businesses compare them when picking communication tools.
これが私が発見したことです。
Instantly とは何ですか?
Instantly AI is a sales engagement platform and cold email outreach tool. It uses AI to help sales and marketing teams automate lead generation.
The platform lets you connect unlimited email accounts and run large-scale email campaigns from one dashboard.
Instantly users get access to unlimited メールウォームアップ, smart inbox rotation, and AI features for personalized emails.
Instantly turns leads into pipeline by combining sending accounts, the Instantly Lead Finder, and a unified inbox in one place.
🏆 勝者：Instantly
Instantly holds a 4.9/5 rating on G2 — among the highest of any B2B SaaS tool. Users have reported booking 2-5 meetings every day after running their first campaign. Some users got 16 appointments in their first month.
即時価格設定
Here’s what Instantly costs in 2026. The cheapest growth plan starts at $30 per month for email-only campaigns.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 成長 | 月額30ドル | ソロの創業者と 中小企業 |
| ハイパー成長 | 月額77.60ドル | 営業チームの拡大に伴い、アウトリーチ活動も拡大している。 |
| 光速 | 月額286.30ドル | Agencies sending thousands of emails |
| 企業 | カスタム | 特別なニーズを持つ大規模チーム |
無料トライアル: Instantlyは無料トライアルを提供しています。利用開始にクレジットカードは不要です。
返金保証: Instantlyは返金保証を公には宣伝していません。アップグレードする前に利用規約を確認してください。
📌 注記： Every plan includes unlimited email warmup and unlimited accounts for sending emails. Users have reported saving over $10,000 per year on warm-up alone after switching to Instantly.
⚠️ 警告： The B2B lead database is a separate add-on with three pricing plans of its own. Budget for verified leads separately if you need lead lists.
Instantlyの主なメリット
Here’s why Instantly stands out from other tools:
- 無制限のメールアカウント: Instantly lets you connect and rotate sending volume across an unlimited number of email accounts within a single campaign. This protects sender reputation and helps you send thousands of cold emails.
- スマートなウォームアップと受信トレイのローテーション： The warm-up feature has over 1.5 million users, making it the largest peer-to-peer deliverability pool. It helps avoid spam filters and builds sender reputation.
- AIを活用したリードファインダー： Instantly’s optional SuperSearch add-on provides access to a database of over 160 million B2B contacts. Filter by job title, LinkedIn URL, industry, or company size to find verified leads.
- AI Personalization with Custom Variables: AI アシスタント generates email content, subject lines, and sequences using custom variables and conditional logic. Every email feels like a personalized email.
- 統合受信トレイ（Unibox）： Manage all replies from separate campaigns in a single unified inbox. The platform’s AI categorizes responses by intent for early-stage conversations.
- Campaign Analytics & Smart Scheduling: Track response rates, opens, and meetings booked in real time. Smart scheduling and advanced automations help you scale your outreach without losing personal touch.
即座にメリットとデメリット
✅ メリット
- Unlimited email accounts on every paid plan
- Largest deliverability network with 1.5M+ users
- 160M+ B2B verified leads via SuperSearch add-on
- AI personalization with custom variables and conditional logic
- Affordable starting price at $30/month flat fee
❌ デメリット
- リードファインダーデータベースは基本プランとは別に料金がかかります。
- Email personalization is more basic than SmartReach.io’s hyper-personalization
- Campaign creation is simpler than Lemlist’s complex sequences
Zendeskとは何ですか？
Zendesk is a cloud-based customer support software platform that centralizes customer interactions in one interface.
The Zendesk suite pulls in support requests from email, live chat, social messaging, and phone into a unified agent workspace.
Zendesk is headquartered in San Francisco. The company started the customer experience revolution in 2007. CEO Tom Eggemeier now leads the business.
Zendesk serves over 200,000 customers worldwide. Many customers are Fortune 100 and Fortune 500 companies including Uber, Shopify, and Slack.
ゼンデスク
Forbes named Zendesk the best platform for customer service in 2023. The customer service software ranks #1 in digital service use cases per Gartner. Zendesk has been recognized by G2 for four consecutive years.
Zendeskの価格
Here’s what Zendesk’s pricing looks like in 2026. All plans are billed per agent per month.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| スイートチーム | エージェント1人あたり月額55ドル | 小規模なサポートチームが始動 |
| スイートの成長 | エージェント1人あたり月額89ドル | 成長中のチームには、より多くのものが必要 オートメーション |
| スイートプロフェッショナル | エージェント1人あたり月額115ドル | Advanced teams needing full reporting and analytics |
無料トライアル: Zendesk offers a 14-day free trial. The trial includes all features of the Zendesk Suite Professional plan.
返金保証: Zendesk also has a startup program. Qualifying small businesses can use Zendesk for free for six months.
📌 注記： Zendesk also offers a Team plan at $19 per agent per month for basic support agents. The Suite Team plan adds messaging and live chat. Users can input agent counts to receive an updated quote.
⚠️ 警告： Zendesk’s pricing scales by number of support agents. Costly ダウンタイム and unused seats can drive up the total cost fast for larger teams.
Zendeskの主なメリット
Here’s why Zendesk stands out as customer service software:
- Unified Agent Workspace: The agent workspace gives a 360-degree view of customer history, including order history. Support agents can respond across multiple channels and multiple languages from one screen.
- Powerful Ticketing System: Zendesk’s ticketing system organizes support tickets from multiple channels in one place. Custom workflows use triggers, automations, and macros to manage requests automatically.
- AIと自動化： Zendesk’s AI features can resolve over 80% of routine inquiries automatically. The platform suggests responses to support agents and recommends next actions.
- 1,300+ Integrations & Custom Apps: The Zendesk marketplace offers over 1,300 pre-built apps and integrations. The Slack integration lets users create and update support tickets without leaving chat.
- Knowledge Base & Help Center: Build help center articles so customers solve issues outside business hours. Self-service reduces ticket volume and improves customer satisfaction.
- レポートと分析: Detailed reports cover team’s performance, customer trends, and channel use. Reporting and analytics in Zendesk rank #1 for digital customer service per Gartner.
- エンタープライズグレードのセキュリティ: All communications use HTTPS/TLS 1.2+. Service data is encrypted at rest with AES-256. Two-factor authentication and IP restrictions protect sensitive information.
Zendeskのメリットとデメリット
✅ メリット
- Trusted by 200,000+ businesses including Fortune 100 companies
- AI features resolve over 80% of routine support tickets
- 1,300+ pre-built apps in the Zendesk marketplace
- AES-256 encryption and two-factor authentication for security
❌ デメリット
- Per-agent pricing drives up total cost for larger support teams
- No outbound sales features or cold emailing tools
- Higher entry price than community forum-based competitors
機能比較
Ready to dive into a detailed comparison of Zendesk vs Instantly? We’ll explore 9 key features to help you make an informed decision.
Each section covers what each tool does best. The goal is to help you pick the right tool for your business.
| 特徴 | 即座に | ゼンデスク |
|---|---|---|
| 開始価格 | 月額30ドルの定額料金 | エージェント1人あたり月額55ドル |
| 無料トライアル | ✅ | ✅（14日間） |
| コールドメールによるアウトリーチ | ✅ | ❌ |
| チケットシステム | ❌ | ✅ |
| B2Bリードデータベース | ✅（1億6000万件以上の連絡先） | ❌ |
| AI機能 | ✅ メールAI | ✅ チケットの80%以上を解決 |
| 無制限のメールウォームアップ | ✅ | ❌ |
| アプリ連携 | Zapier integration | ✅ 1,300+ native apps |
| レポートと分析 | キャンペーン分析 | ✅ Advanced (Gartner #1) |
| 最適な用途 | 営業活動 | カスタマーサポート |
1. Email Deliverability & Warm-Up
即座に: Instantly’s deliverability focus is built into the basic package. The integrated email warming service helps protect the domain’s reputation by rotating sending volume across all your sending accounts. The warm-up feature simulates human-like conversations and email opens to improve sender reputation. Users have noted volume, copy, and deliverability are the three crucial elements of cold email — and Instantly nails all three.
ゼンデスク: Zendesk handles inbound email as part of its desk software. It does not offer cold email features, unlimited email warmup, or sending account rotation. All communications with Zendesk APIs are encrypted via industry standard HTTPS/TLS over public networks. Great for support, irrelevant for outbound outreach.
⚠️ 警告： If you need outbound cold emails or a deliverability network, Zendesk simply isn’t built for it. すぐに使える for cold outreach and Zendesk for inbound support.
2. Lead Generation & B2B Lead Database
即座に: The Instantly Lead Finder (SuperSearch add-on) provides access to 160 million B2B contacts. You can filter by job title, LinkedIn URL, industry, location, and lookalike domains. The lead finder helps you build verified lead lists in minutes. Mark leads as interested, not interested, or follow-ups directly inside the platform.
ゼンデスク: Zendesk does not include lead generation features. The platform manages existing customer relationships, not new prospects. For sales pipeline work, Zendesk Sell offers basic CRM features for syncing customer data — but no B2B lead database.
3. AI機能と自動化
即座に: The AI assistant can generate email content, subject lines, and entire sequences using custom variables and conditional logic. AI categorizes responses by intent for early-stage conversations. This helps support response management without manual review of every reply.
ゼンデスク: Zendesk’s AI features can resolve over 80% of routine inquiries automatically. The system suggests responses to support agents and recommends actions based on ticket context. Zendesk also supports custom workflows through triggers, automations, and macros for complex use cases.
✅ テスト結果： Both tools use AI well. Instantly focuses on outbound personalization at scale. Zendesk focuses on inbound resolution. AI is anticipated to serve as a core engine across major industries in 2026 — both tools reflect this trend.
4. Ticketing System & Customer Support
即座に: Instantly does not have a ticketing system. It is a sales engagement tool, not a customer support platform. To manage support requests or customer service software workflows, you need a dedicated tool like Zendesk.
ゼンデスク: Zendesk’s ticketing system is one of the strongest in the industry. It centralizes support requests from multiple channels — email, live chat, social messaging, and phone. Support agents see customer history and order history at a glance for personalized customer service. Sunshine Conversations powers messaging across apps.
5. Campaign Builder & Outreach Campaigns
即座に: キャンペーン ビルダー lets you create separate campaigns with multi-step sequences and automated outreach. Set custom delays, build follow ups, and trigger automated outreach actions based on recipient behavior. Smart scheduling sends emails at the best times to boost response rates and close deals faster.
ゼンデスク: Zendesk does not offer email campaigns or sales engagement sequences. Instead it uses custom workflows, triggers, and automations to route incoming customer conversations. These are reactive workflows, not proactive outreach campaigns.
6. 統合とマーケットプレイス
即座に: Instantly relies on third-party integrations through Zapier integration and native connections to popular CRMs. The platform includes a built-in automated CRM for managing leads and outreach. Native integration depth is more limited compared to Zendesk.
ゼンデスク: The Zendesk marketplace offers over 1,300 pre-built apps and integrations. Connect natively with Salesforce, Slack, Shopify, and hundreds of other tools. Zendesk’s integration capabilities allow companies to scale operations across their tech stack. The Slack integration enhances collaboration by letting users create support tickets without leaving Slack.
⚠️ 警告： Zendesk’s app integration advantage is significant. If your business runs on a complex tech stack with custom apps, Zendesk plugs in more naturally than Instantly.
7. 分析とレポート
即座に: Campaign analytics track open rates, response rates, click rates, and meetings booked per campaign. The dashboard is clean and easy to read in any browser. You can filter results by account, campaign, or date range to make informed decisions about email marketing strategy.
ゼンデスク: Zendesk’s reporting and analytics are far more advanced. Track team’s performance, ticket resolution times, customer satisfaction scores, and channel trends. Detailed reports gather actionable insights for informed business decisions. Gartner ranks Zendesk #1 in digital customer service analytics.
8. Security & Multilingual Support
即座に: Instantly handles sender authentication, IP rotation, and email validation to keep emails out of the spam folder. Email validation cleans your lists before campaigns launch. Security focuses on outbound email integrity, not enterprise compliance.
ゼンデスク: Security in Zendesk is enterprise-grade. Service data is encrypted at rest with AES-256. Admins can restrict access to specific IP ranges like office sites. Two-factor authentication via SMS or authenticator apps protects agent login. Zendesk also offers multilingual support for global customers in multiple languages — a key need for businesses serving global users.
9. 価格設定とコスト
料金プランを並べて比較してみましょう。
| プラン | 即座に | ゼンデスク |
|---|---|---|
| エントリープラン | 成長：月額30ドル | スイートチーム：エージェント1人あたり月額55ドル |
| 中級クラス | ハイパーグロース：月額77.60ドル | Suite Growth：エージェント1人あたり月額89ドル |
| トップティア | ライトスピード：月額286.30ドル | Suite Professional：1エージェントあたり月額115ドル |
| 企業 | カスタム | カスタム（営業担当までお問い合わせください） |
即座に: Instantly charges a flat monthly fee — not per user. The growth plan at $30/month gives unlimited accounts and unlimited email warmup. This is one of the best tool options for small businesses on a tight budget.
ゼンデスク: Zendesk’s pricing is per agent per month. A team of five support agents on Suite Team costs $275/month. The total cost scales fast as your support team grows. Zendesk also offers a Team plan at $19 per agent per month for the most basic tier.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| コールドメールによるアウトリーチ | 即座に | Built for outreach campaigns at scale |
| カスタマーサポートチケット | ゼンデスク | Best-in-class ticketing system |
| 予算が限られている場合（定額料金） | 即座に | $30/month for unlimited accounts |
| Salesforce or Slack integrations | ゼンデスク | 1,300+ native apps in marketplace |
| B2Bリードデータベース | 即座に | 160M+ verified leads via Lead Finder |
| AI-resolved support tickets | ゼンデスク | AI handles 80%+ of routine tickets |
| Multilingual support across regions | ゼンデスク | Multiple languages, multilingual support |
💰 あなたの予算
Instantly is far cheaper for small businesses at $30/month flat. Zendesk’s pricing starts at $55/agent/month — a five-person team spends $275/month minimum, and the total cost grows with each new agent.
🔌 あなたの技術スタック
Zendesk wins for connecting other tools. The Zendesk marketplace has 1,300+ apps and integrations including Salesforce, Slack, and Shopify. Instantly relies on Zapier integration for connecting most third-party platforms.
📝 あなたのユースケース
This is the biggest factor. If you run a sales team chasing potential clients, choose Instantly. If you manage a support team handling support tickets and customer conversations, choose Zendesk.
🎓 あなたの経験レベル
Both tools are beginner-friendly. Instantly lets you launch your first outreach campaign in under 30 minutes. Zendesk is designed for support agents to use from day one — admin setup takes longer for larger teams.
🆓 無料トライアルとデモ
Both tools offer free trials. Zendesk gives 14 days of full Suite Professional access. Instantly also has a free trial with no credit card required. Test both to make an informed decision before committing.
🛟 サポートオプション
Zendesk offers strong customer support given it’s a support company itself. Instantly has active community forums, knowledge base resources, and helpful documentation. Both tools provide solid support outside business hours.
🔐 Security & Sensitive Information
Zendesk is the clear winner for handling sensitive information. AES-256 encryption, two-factor authentication, and IP restrictions protect customer data. Instantly’s security focuses on email-level protections only.
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？
🔄 InstantlyからZendeskに切り替えますか？
✅ 得られるもの：
- Full omnichannel ticketing system with multilingual support
- AI features that resolve 80%+ of routine support tickets
- 1,300+ apps and integrations including Salesforce in the Zendesk marketplace
❌ 失うもの：
- Unlimited email accounts for cold outreach campaigns
- 1億6000万件以上のB2Bリードデータベースへのアクセス
- Flat-fee pricing — Zendesk’s pricing scales per agent
📋切り替え方法：
- Instantlyからリードリストとキャンペーンデータをエクスポートします
- Sign up for the Zendesk free trial and configure support channels
- Import customer data and set up custom workflows for ticket routing
🔄 ZendeskからInstantlyに切り替えますか？
✅ 得られるもの：
- Unlimited email accounts and unlimited email warmup
- Access to a 160M+ verified leads B2B lead database
- Flat-fee pricing that won’t grow with team size
❌ 失うもの：
- Omnichannel inbound ticketing for support requests
- The Zendesk marketplace with 1,300+ pre-built apps
- Advanced reporting and analytics for team’s performance
📋切り替え方法：
- Export customer data and contact details from Zendesk
- Instantlyアカウントを作成し、送信メールアカウントを接続してください。
- Import contacts, run warm-up sequences, and launch your first outreach campaign
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰価格対価値 | 即座に |
| 📧 Email Outreach & Deliverability | 即座に |
| 🎯 B2B Lead Generation | 即座に |
| 🎫 チケット販売システム | ゼンデスク |
| 🔌 App Integrations | ゼンデスク |
| 📊 レポートと分析 | ゼンデスク |
| 👶 Setup Speed | 即座に |
| 🏆総合優勝 | 即座に |
🏆 勝者：即時
この比較では、7つのカテゴリーのうち4つで即座に勝利を収めた。
最適な用途: B2B sales teams, cold email outreach, lead generation, and small businesses on tight budgets
Instantly and Zendesk are two very different tools built for two different teams.
Instantly is a sales engagement platform for sending thousands of cold emails and booking meetings.
Zendesk is the gold standard customer service software for managing support tickets and customer conversations.
Zendesk is excellent for businesses with active support queues, large support agents teams, and complex employee experience needs.
However, if you need to scale your outreach, generate B2B leads, and book meetings on a tight budget, Instantly is the better tool.
Now go out and start booking those sales meetings!
Instantly Compared のその他の記事
Here’s how Instantly stacks up against other email outreach tools:
即座に勝利を収めるポイント： Larger warm-up network, unlimited sending accounts, flat-fee pricing
スノフ 勝利したタイトル： LinkedInネイティブのプロスペクティング、メールアドレス検索Chrome拡張機能
即座に勝利を収めるポイント： Email deliverability, warm-up features, simpler campaign setup
アポロ 勝利したタイトル： より大規模な連絡先データベース、内蔵ダイヤラー、マルチチャネルシーケンス
即時返信 vs 返信.io
即座に勝利を収めるポイント： Pricing, warm-up network size, ease of setup
Reply.ioが優れている点： LinkedInとSMSによるマルチチャネルアウトリーチ
即座に勝利を収めるポイント： Unlimited email accounts, warm-up depth, affordable pricing
メールシェイク 勝利したタイトル： LinkedIn automation, native data finder tool
即座に勝利を収めるポイント： 配送能力重視、ウォーミングアップ用プール規模、シンプルな価格設定
レムリスト 勝利したタイトル： More complex campaign creation, image and video personalization
即座に vs キツツキ
即座に勝利を収めるポイント： Scale, B2B lead database, AI features
キツツキの勝利： Agency white-labeling, client management features
即座に勝利を収めるポイント： ウォームアップネットワーク、使いやすさ、ブランド評判
スマートリード 勝利したタイトル： 高度な受信トレイローテーションルール、詳細なウォームアップコントロール
即座に勝利を収めるポイント： 配信可能性、ウォームアップ、リードデータベースのサイズ
セールスハンディ 勝利したタイトル： メール追跡機能、文書送信機能
即座に勝利を収めるポイント： Email sending and warmup capabilities, campaign builder
アップリード 勝利したタイトル： Real-time email verification, more granular contact filters
即座に勝利を収めるポイント： Full outreach platform with lead gen and campaign builder
ウォームボックス 勝利したタイトル： Dedicated warmup-only product with deeper inbox placement settings
即座に勝利を収めるポイント： Standout features, AIツール, community forums and support
メールドソ 勝利したタイトル： ウォームアップのみが必要な初心者向けのシンプルなインターフェース
即座に vs ウォーミー
即座に勝利を収めるポイント： オールインワンのアウトリーチプラットフォーム、リードデータベース、キャンペーン
Warmyが勝利した点： 詳細な受信トレイ配置レポートを備えた専用ウォームアップ製品
Zendeskの比較をもっと見る
Here’s how Zendesk stacks up against other customer service software tools:
Zendesk vs Freshdesk
Zendeskが優れている点： Enterprise features, deeper analytics, brand reputation
Freshdeskが優れている点： 開始価格が安く、無料プランも利用可能
Zendesk vs Intercom
Zendeskが優れている点： Ticketing system depth, agent workspace, reporting and analytics
Intercomが勝利した点： アプリ内メッセージング、製品ツアー、プロアクティブなサポート
Zendesk vs Help Scout
Zendeskが優れている点： 規模、統合、AI自動化機能
Help Scoutの勝利実績： Simplicity, personal feel, better fit for small teams
Zendeskが優れている点： Larger integration marketplace, AI features, brand trust
Zoho Deskが優れている点： Lower pricing, fit for Zoho-based teams, free plan
よくある質問
Instantly AIは何に使われていますか？
Instantly AI is a sales engagement platform for cold email outreach. It automates lead generation, runs email campaigns at scale, and helps sales teams improve email deliverability through unlimited email warmup.
ZendeskはCRMですか？
Zendesk is primarily customer support software, not a traditional CRM. Zendesk Sell is the sales CRM add-on for managing customer data and deals. The core platform focuses on support tickets and customer service.
Instantly AIには無料トライアルはありますか？
Yes, Instantly offers a free trial with no credit card required. You can test core features like the campaign builder, warmup, and unified inbox before committing to a paid plan.
Zendeskは無料で利用できますか？
Zendesk has no permanent free plan. It offers a 14-day free trial of Suite Professional with no credit card needed. Qualifying small businesses can also use Zendesk free for six months through the startup program.
ApolloはInstantlyよりも優れていますか？
Apollo offers a larger contact database with built-in phone dialer. Instantly is better for pure email deliverability and warm-up at scale. Pick Apollo for multichannel outreach; pick Instantly for high-volume cold email.
English 
Spanish 
Chinese 
German 
French 
Arabic 
Russian 
Portuguese 
Japanese 
Korean 
Italian 
Turkish 
Dutch 
Polish 
Indonesian 
Thai 
Vietnamese 