⚡ Quick Verdict:
- 価格: Instantly starts at $30/month (flat fee). Mailshake starts at $25/month.
- 最適な用途: Instantly for high-volume cold email campaigns with unlimited sending accounts. Mailshake for small sales teams blending email, phone, and LinkedIn outreach.
- 主な違い： Instantly focuses on cold email scale with unlimited sending accounts. Mailshake adds multichannel sequences with LinkedIn and phone.
- Our pick: Instantly for most users — cheaper at scale, plus a 450M+ B2B lead database built in.
Choosing between Instantly and Mailshake comes down to one question.
Do you need high-volume cold email or multichannel outreach?
Instantly vs Mailshake comparison highlights how both platforms automate email campaigns and drive meeting bookings.
But they solve different problems for different users.
Instantly is built for scale — unlimited email accounts and inbox rotation.
Mailshake is built for small sales teams blending email, phone, and LinkedIn in one workflow.
概要
This comparison covers pricing, features, deliverability, and ease of use.
We also break down who each tool works best for.
Our sources include published specs, documentation, and G2 reviews.
Our writers have also spent hands-on time with both tools.
By the end, you’ll know which tool fits your outreach efforts.
Instantly とは何ですか?
Instantlyは、大量のメール配信を目的としたコールドメールプラットフォームです。
It helps sales and marketing teams send cold emails at scale without hitting spam.
The platform includes unlimited email accounts, inbox rotation, and a 450M+ B2B lead database.
It also bundles automated follow ups, an email finder tool, and a built-in CRM.
Most users choose it to drive rapid growth without hiring a full sales team.
即座に
A cold email platform built for scale. Unlimited sending accounts, auto warm-up, and a 450M+ B2B lead database in one tool.
即時価格設定
Instantlyの2026年の料金は以下の通りです。詳しく見ていきましょう。
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 成長 | 月額30ドル | ソロ創業者がコールドメールをテスト |
| ハイパー成長 | 月額77.60ドル | Startups scaling outreach (25,000 leads) |
| 光速 | 月額286.30ドル | 複数のキャンペーンを実施している代理店 |
| 企業 | カスタム | Large sales and marketing teams |
Pricing verified April 2026.
無料トライアル: Yes. Instantly offers a 14-day free trial with no credit card required.
返金保証: Instantly offers a standard refund window on annual plans. Check the billing page for current terms before subscribing.
📌 注記： The Growth Plan at $30/month covers 1,000 active leads and 5,000 emails. The Hypergrowth Plan at $77.60/month expands that to 25,000 active leads and 100,000 emails. Every paid plan includes unlimited sending accounts — a key advantage for teams that run many inboxes.
⚠️ 警告： The lead database and email verification credits are sold separately. If you plan to use Instantly’s 450M+ B2B contacts database, factor in extra cost for lookup credits on top of the base plan.
Instantlyの主なメリット
Here’s what makes Instantly worth considering:
- 無制限のメールアカウント: Every paid plan lets you connect an unlimited number of sending inboxes. This is the biggest advantage for agencies and teams running high-volume cold email.
- Inbox Rotation and Warm-up: Instantly rotates sending volume across your email accounts automatically. This helps avoid spam filters and protects sender reputation.
- 4億5000万件以上のB2Bリードデータベース： The built-in lead finder gives you access to hundreds of millions of verified 仕事 contacts. You can filter by industry, role, location, and company size.
- AI Personalization at Scale: AI writes personalized messages for each prospect using データ from their profile. This boosts reply rates on large campaigns.
- 定額料金制： Plans are priced per account, not per mailbox. Teams can add more seats and sending inboxes without inflating the bill.
- High Inbox Placement: According to published benchmarks, Instantly shows inbox placement rates around 85.3% for 中小企業 scaling email outreach.
What Our Team Noticed
Our writer signed up for Instantly and spent several days running a small cold email campaign. Here’s what stood out:
即座にメリットとデメリット
✅ メリット
- Unlimited email accounts on every paid plan
- Automatic inbox warm-up and rotation protect deliverability
- Built-in 450M+ B2B lead database saves tool costs
- Flat-fee pricing scales well for teams and agencies
❌ デメリット
- No built-in phone or LinkedIn outreach channels
- Lead database credits cost extra on top of the base plan
- 学習曲線は、よりシンプルなメールツールよりも急峻である。
Mailshakeとは何ですか?
Mailshake is a sales engagement platform built for small sales and marketing teams.
It helps reps mix cold emails, phone calls, and LinkedIn touches in one sequence.
The platform includes an AI email writer, a data finder, and a Lead Catcher inbox.
It also supports mail merge, automated follow ups, and customizable templates for email campaigns.
Most users choose Mailshake to book meetings through multichannel cold outreach.
メールシェイク
A sales engagement platform for small teams. Combine email sequences, phone calls, and LinkedIn outreach in one workflow.
Mailshakeの価格設定
Here’s what Mailshake costs in 2026. Let’s break it down.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| スターター | 月額25ドル | Solo reps sending basic cold emails |
| メールによるアウトリーチ | 月額45ドル | Full email automation with mail merge and multichannel outreach |
Pricing verified April 2026.
無料トライアル: Mailshake does not offer a free plan. It offers a 30-day money-back guarantee instead of a traditional free trial.
返金保証: 30 days. Cancel within that window for a full refund on your first subscription.
📌 注記： Mailshake’s Starter plan focuses on basic cold email sending. The Email Outreach plan unlocks advanced automation, mail merge, and multichannel outreach with LinkedIn and phone tasks in a single sequence.
⚠️ 警告： The Starter plan at $25/month has limited features. To unlock automation, mail merge, and multichannel sequences you’ll need to step up to Email Outreach at $45/month. Prices shown are monthly but are typically billed annually — review the checkout before committing.
Mailshakeの主なメリット
Here’s what makes Mailshake worth considering:
- マルチチャンネルシーケンス： Mailshake blends cold email, LinkedIn touches, and phone calls into one sequence. This matters for sales teams that need more than email to book meetings.
- AIメールライター（シェイクスピア）： The built-in AI drafts cold emails based on your offer and target audience. It saves time when you’re writing subject lines and call to action buttons from scratch.
- リードキャッチャー: A unified reply inbox that flags positive responses from your campaigns. You can mark leads as interested, not interested, or out of office in one click.
- CRM連携： Mailshake integrates with Salesforce and Pipedrive out of the box. Data syncs two-way, so logged emails and replies show up in your CRM.
- Mail Merge and Templates: Personalize cold emails at scale using CSV uploads and customizable templates. Every paid plan includes mail merge personalization.
- 電話ダイヤラー: The Email Outreach plan includes a built-in power dialer. Reps can call prospects directly from the Mailshake app without switching tools.
What Our Team Noticed
Our writer set up Mailshake for a small outreach campaign and explored the sequence builder. Here’s what stood out:
Mailshakeのメリットとデメリット
✅ メリット
- Multichannel sequences combine email, phone, and LinkedIn
- SalesforceとPipedriveのネイティブ統合
- Lead Catcher reply management saves time on follow up
- AI email writer helps with subject lines and copy
❌ デメリット
- Starter plan is stripped down — real automation requires stepping up to Email Outreach
- Phone and LinkedIn features require the Email Outreach plan (Starter is email-only)
- Instantlyが提供するような無制限のメールアカウントはありません。
機能比較
Ready to dive into a detailed comparison of Instantly vs Mailshake? We’ll explore nine key features to help you decide which platform fits your cold outreach.
| 特徴 | 即座に | メールシェイク |
|---|---|---|
| 開始価格 | 月額30ドル（定額） | 月額25ドル |
| 無料プラン | ❌（14日間無料トライアル） | ❌（30日間返金保証） |
| 無制限のメールアカウント | ✅ | ❌ |
| 組み込みリードデータベース | ✅（4億5000万件以上の連絡先） | ✅ (Data Finder) |
| Inbox Warm-up & Rotation | ✅（自動） | ✅ (deliverability tools) |
| LinkedInの自動化 | ❌ | ✅ (Email Outreach plan) |
| 電話ダイヤラー | ❌ | ✅ (Email Outreach plan) |
| AIメールライター | ✅ (AI prompts) | ✅ (SHAKEspeare) |
| CRM連携 | ✅ (built-in CRM) | ✅ (Salesforce, Pipedrive) |
| 最適な用途 | 大量のコールドメール | Multichannel sales outreach |
1. Sending Scale and Email Accounts
即座に: Every paid plan allows an unlimited number of sending accounts. You can connect hundreds of inboxes and rotate sending volume across all of them. This is designed for agencies and teams running high-volume cold email campaigns where deliverability at scale matters most.
メールシェイク: Mailshake limits sending volume and caps email accounts based on your plan tier. The Starter plan includes basic sending, while the Email Outreach plan lifts the cap. It’s enough for small sales teams but not built for running hundreds of inboxes in parallel.
2. Lead Generation and Contact Database
即座に: The AI-Powered Lead Finder connects to a B2B lead database with over 450 million contacts. You can filter prospects by job title, company size, industry, and location, then push them into a campaign in a few clicks. This helps generate leads without paying for a separate email finder tool.
メールシェイク: The Data Finder pulls verified business emails and phone numbers. It works well for finding prospects one-off or in small batches. However, the contact pool is smaller than Instantly’s 450M+ database, which matters if your lead generation depends on wide reach.
3. メールの配信性
即座に: Inbox rotation distributes volume across multiple sending accounts automatically. Combined with automatic warm-up, this keeps sender reputation strong and avoids spam filters. Based on published benchmarks, small businesses report inbox placement rates around 85.3% when scaling outreach through Instantly.
メールシェイク: Mailshake includes email deliverability tools, sending schedules, and throttling controls. Features help keep bounce rates low and maintain sender health. It lacks the aggressive inbox rotation Instantly provides, but it’s enough for a small team sending hundreds of emails per day rather than thousands.
4. Multichannel Outreach (LinkedIn and Phone)
即座に: Instantly focuses on email only. There’s no native LinkedIn automation or phone dialer. If you need multichannel sequences, you’ll need to layer on another tool or handle those channels manually outside the platform.
メールシェイク: The Email Outreach plan adds LinkedIn automation and a built-in phone dialer. Sequences can mix email steps with LinkedIn connection requests and scheduled call tasks. This is the main reason small sales teams pick Mailshake over cold-email-only tools.
⚠️ 警告： LinkedIn automation and the phone dialer require Mailshake’s Email Outreach plan at $45/month. The Starter plan at $25/month is email-only and won’t give you multichannel sequences.
5. AI Personalization and Email Writing
即座に: Hyper-Personalization with AI generates custom opening lines and personalized messages using data from each prospect’s profile. You can also set AI prompts that tailor messages across the full campaign. This helps at volume, where writing manual intros for every contact isn’t feasible.
メールシェイク: SHAKEspeare is Mailshake’s AI email writer. It drafts cold email copy, subject lines, and call to action buttons based on your input. It’s a solid starting point when you’re stuck on copy, though heavy personalization still requires your own writing on top.
6. Automated Follow-Ups and Sequences
即座に: The campaign builder supports automated follow ups, A/B testing on subject lines and body copy, and branching logic based on replies. Campaigns stop automatically when a prospect replies, opens a link, or marks the email as read. Auto responders also handle bounces and out-of-office replies.
メールシェイク: Sequences include automated follow-up emails, conditional steps based on opens and clicks, and auto responders. The visual sequence builder is easy to learn for new users. A/B testing is available on all email automation tools, though the interface is less granular than Instantly’s.
7. CRM and Lead Management
即座に: A built-in Automated CRM tracks replies, assigns leads to pipelines, and flags hot prospects. You can move prospects through stages without exporting data to another tool. Native integrations also connect with external CRMs for teams that already have a sales stack in place.
メールシェイク: Mailshake integrates with major CRM tools like Salesforce and Pipedrive for two-way data sync. It also has Lead Catcher, a lightweight inbox for managing replies directly inside Mailshake. It doesn’t have a full CRM of its own, so you’ll rely on the integrated CRM for pipeline management.
8. Analytics and Real-Time Insights
即座に: Campaign Analytics tracks open rates, click through rates, reply rates, and bounce rates in real time. You can compare campaigns side by side and spot which subject lines or templates drive the best outcomes. Dashboards are designed for teams managing many campaigns at once.
メールシェイク: Mailshake shows open rates, clicks, replies, and A/B test results for each campaign. Reports are straightforward and surface the basics without extra setup. Deeper cross-campaign analysis is more limited compared to Instantly’s dashboards.
9. Integrations and Tool Compatibility
即座に: Native integrations cover major CRMs, ザピエール, webhooks, and Hyperise for personalized images. You can sync replies, opens, and lead status with your existing tools. The platform is built to play nicely with other marketing tools in your stack.
メールシェイク: Mailshake integrates with Salesforce, Pipedrive, HubSpot, Zapier, and Hyperise. Both Instantly and Mailshake use the Image embed method to integrate with Hyperise, letting you add personalized images to outreach. Two-way CRM sync is the strongest point here.
価格とコスト
料金プランを並べて比較してみましょう。
| プラン | 即座に | メールシェイク |
|---|---|---|
| エントリ | Growth — $30/month | Starter — $25/month |
| 中級 | Hypergrowth — $77.60/month | Email Outreach — $45/month |
| ハイティア | Light Speed — $286.30/month | — |
| 企業 | カスタム | 営業担当者へのお問い合わせ |
即座に: The flat-fee structure is where Instantly wins on cost. A $30/month Growth Plan covers 1,000 active leads and 5,000 emails with unlimited sending accounts. Even the Hypergrowth Plan at $77.60/month covers 25,000 leads and 100,000 emails. Adding more team members doesn’t raise the price.
メールシェイク: Mailshake’s Starter plan at $25/month is the cheaper entry point, but it’s a stripped-down cold email plan. To unlock automation, mail merge, multichannel sequences, and the phone dialer, you need the Email Outreach plan at $45/month. For teams that genuinely need phone and LinkedIn automation, $45/month is a reasonable cost to combine three channels in one tool.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| 予算が限られている | 即座に | Flat $30/mo with unlimited sending accounts |
| 大量のコールドメール | 即座に | 無制限の送信アカウント |
| LinkedIn + phone outreach | メールシェイク | Built-in multichannel sequences |
| Lead database built in | 即座に | 4億5000万件以上のB2Bコンタクトが含まれています |
| Salesforceとの連携 | メールシェイク | Native two-way CRM sync |
| 初心者向け | メールシェイク | Simpler sequence builder |
| Agency scaling fast | 即座に | Flat fee keeps costs predictable |
💰 あなたの予算
Mailshake’s Starter plan at $25/month is the cheapest entry point, but it’s email-only and expensive compared to what Instantly’s $30/month plan includes. For automation, multichannel, or higher sending volumes, Instantly’s Growth Plan packs more 能力 out of the gate. Pricing models are tight — match the plan to your actual workflow.
🔌 あなたの技術スタック
Mailshake integrates natively with Salesforce and Pipedrive, which is a plus if your CRM is already in place. Instantly has its own built-in CRM and connects to external tools through Zapier and webhooks.
📝 あなたの文章スタイル
If you write every email manually and personalize deeply, Mailshake’s SHAKEspeare AI is fine as a starting point. If you need AI to generate personalized messages at volume, Instantly’s hyper-personalization handles that better.
🎓 あなたの経験レベル
Mailshake is friendlier for first-time users with a cleaner sequence builder. Instantly offers more advanced features but has a steeper learning curve, especially around inbox rotation and deliverability settings.
🆓 無料トライアルとデモ
Instantly has a 14-day free trial with no credit card required, so you can test the product risk-free. Mailshake doesn’t offer a free plan but backs purchases with a 30-day money-back guarantee.
🛟 サポートオプション
Both platforms offer email support, knowledge bases, and live chat during business hours. Mailshake is known for hands-on onboarding sessions, while Instantly leans more on community Slack and self-serve documentation.
切り替えガイド
Already using one of these two tools? Here’s what to expect if you switch.
🔄 InstantlyからMailshakeに切り替えますか？
✅ 得られるもの：
- LinkedIn automation and a built-in phone dialer
- Native Salesforce and Pipedrive two-way sync
- Hands-on onboarding and live support sessions
❌ 失うもの：
- Unlimited email accounts on every paid plan
- The 450M+ B2B lead database built in
- Flat-fee pricing — one plan covers your whole team, no seat add-ons
📋切り替え方法：
- Export your campaigns, contacts, and templates from Instantly as CSV files
- Create your Mailshake account and connect your sending email accounts
- Import contacts into Mailshake and rebuild your sequences using the template library
🔄 MailshakeからInstantlyに切り替えますか？
✅ 得られるもの：
- Unlimited sending accounts on every paid plan
- Access to a 450M+ B2B lead database
- Flat-fee pricing that scales with your team size
❌ 失うもの：
- Native LinkedIn automation and phone dialing
- Native Salesforce and Pipedrive sync
- Hands-on onboarding — Instantly is more self-serve
📋切り替え方法：
- Export your contact lists and campaigns from Mailshake as CSV files
- Sign up for Instantly and connect your sending email accounts for warm-up
- Import leads and rebuild campaigns using Instantly’s campaign builder
What Our Review Didn’t Cover
This comparison focused on solo founders and small sales and marketing teams. We didn’t evaluate enterprise-level features like custom SLAs, dedicated IPs at large volume, or custom pricing negotiations. Deliverability results vary by industry and list quality, so your open rates and click through rates may differ from published benchmarks. If you’re running outreach in regulated industries or sending to strict markets, test both tools with a small list before committing.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰価格 | 即座に |
| 🚀 主な機能 | 即座に |
| 📨 Email Deliverability | 即座に |
| 📞 Multichannel Outreach | メールシェイク |
| 🔌 CRM連携 | メールシェイク |
| 👶 使いやすさ | メールシェイク |
| 🎯 リードジェネレーション | 即座に |
| 🏆総合優勝 | 即座に |
🏆 勝者：即時
7つのカテゴリーのうち、5つで即座に勝利を収めた。
最適な用途: High-volume cold email campaigns, agencies managing many clients, and founders who want an email finder and CRM bundled in one tool.
Instantly and Mailshake are two different products built for different users.
Instantly specializes in scale — unlimited email accounts, inbox rotation, and a massive lead database.
Mailshake specializes in multichannel outreach — blending cold email with phone and LinkedIn.
Mailshake is excellent if your sales process needs phone calls and LinkedIn touches alongside email.
However, if you need to drive rapid growth through cold email at scale, Instantly is the better choice.
Instantly Compared のその他の記事
Here’s how Instantly stacks up against other cold email and sales tools:
Instantly vs Smartlead
即座に勝利を収めるポイント： Bigger built-in lead database, cleaner UI, and better analytics dashboards for teams running many campaigns.
Smartleadが優れている点： Deeper API access, master inbox for multi-agency workflows, and more granular sub-sequence controls.
インスタントリー vs アポロ
即座に勝利を収めるポイント： Stronger inbox rotation, better deliverability tooling, and a simpler campaign builder focused on cold email.
アポロが勝利した点： Massive sales engagement platform, larger B2B contact database (275M+), and built-in dialer for calls.
Instantly vs Lemlist
即座に勝利を収めるポイント： Flat-fee pricing, unlimited sending accounts, and a bigger lead database for lead generation.
Lemlistが勝利した点： Video personalization, LinkedIn integration, and stronger creative personalization features in email campaigns.
インスタントリー vs スノヴ
即座に勝利を収めるポイント： Unlimited email accounts, inbox rotation, and purpose-built cold email scale.
スノフの勝利条件： Strong email finder tool, domain search, and verified email lookups as a standalone service.
Mailshakeの比較をもっと見る
Here’s how Mailshake stacks up against other sales engagement tools:
MailshakeとReply IOの比較
Mailshakeが勝利した点： Cleaner onboarding, simpler sequence builder, and better suited for small sales teams new to cold outreach.
Reply IOが以下の点で勝利しました： AI SDR agents, deeper sales engagement workflows, and more advanced multichannel triggers.
メールシェイク vs ウッドペッカー
Mailshakeが勝利した点： Built-in phone dialer, LinkedIn automation on the higher plan, and a broader sales engagement feature set.
キツツキの勝利： Strong native deliverability features, per-inbox pricing, and dedicated focus on cold email hygiene.
Mailshake vs Saleshandy
Mailshakeが勝利した点： Phone dialer, LinkedIn touches in sequences, and stronger sales engagement features on the top plan.
Saleshandyが勝つポイント： Cheaper entry-level pricing, unified inbox for replies, and simpler plan structure for solo senders.
Mailshake vs クレンティ
Mailshakeが勝利した点： Better Salesforce-first integrations, Lead Catcher reply management, and cleaner onboarding.
クレンティが勝利した点： Native dialer built for outbound sales, sales cadence playbooks, and deeper HubSpot integration.
よくある質問
Instantly AIは利用する価値があるのか？
Instantly is worth it for teams running cold email campaigns at scale. The flat-fee pricing, unlimited sending accounts, and built-in lead database help sales teams save time compared to stitching together other platforms. For email marketing focused on reaching new customers and driving replies that drive conversions, it’s one of the cleaner all-in-one picks to maximize pipeline without per-seat fees. Solo senders with very low volume may find the entry plan overkill.
MailshakeはOutlookと連携できますか？
Yes. Mailshake connects to Outlook, Gmail, and most SMTP providers. You link your account once, and the tool sends cold emails and automated follow up emails from your address as if you sent them manually. The dashboard acts like a personal assistant for your sequences and gives real time insights into opens, clicks, and replies.
Instantlyでは、一度に何通のメールを送信できますか？
Volume depends on the plan. The Growth Plan covers up to 5,000 emails per month, Hypergrowth extends to 100,000, and Light Speed handles much more. Since Instantly allows an unlimited number of sending accounts, you can scale by adding more inboxes and reach new customers quickly. Campaigns also let you enroll prospects automatically from the built-in lead database, so list building doesn’t bottleneck your sending.
ApolloはInstantlyよりも優れていますか？
Apollo and Instantly solve different problems. Apollo is a full sales engagement platform with a larger database and a dialer. Instantly is focused on cold email scale with unlimited sending accounts. Compared to Mailshake Instantly also leans more toward pure email, while Apollo’s basic plan covers sales workflows too. For better outcomes on multichannel sales pick Apollo; for email-first outreach pick Instantly.
Mailshakeは何に使われるのですか？
Mailshake is used for cold email outreach, sales sequences, and multichannel prospecting. Small sales and marketing teams use it to book meetings by combining email, phone, and LinkedIn touches. It’s especially popular among reps who want email campaigns and phone calls in one workflow. Teams researching Mailshake alternatives often land on Instantly, Reply IO, or Woodpecker depending on their budget and channel mix.
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