From Lead Generation to High-Delivery Outreach. All in One Place.
No email list? Emails landing in spam? Paying too much for Mailchimp? Mail Assist is the ultimate delivery-focused outreach platform built to solve every major B2B marketing headache.
No credit card required. Setup takes minutes.
Built for B2B Companies Who:
Are You Losing Sales Before You Even Start?
Wasting Hours on Lead Gen
You spend more time manually hunting for decision-maker emails than actually selling your product.
Emails Landing in Spam
You finally send the campaign, but shared IPs send your hard work straight to the junk folder. Nobody reads it.
Punished for Growing
Legacy tools like Mailchimp penalize you as your contact list grows, costing hundreds of dollars for lists you aren't even emailing.
B2B Outbound is about Quality, Quantity, and Deliverability
Even the best lead list is useless if your emails land in spam. We take your outbound to the next level with unparalleled deliverability via dedicated domains.
Why Fast-Growing B2B Teams Choose Mail Assist
We're not just another email sender. We are a complete outreach infrastructure powered by AI.
Powerful Marketing Automation
Automatically send personalized emails based on prospect behavior (opens, clicks). Automate your appointment setting and closing completely.
Dedicated Domain Routing
Never get punished for someone else's spam. Your emails are sent via your own dedicated domain with perfect SPF/DKIM/DMARC alignment.
Unlimited Contacts. Flat Rate.
Stop paying per contact. Our Business plan offers unlimited contacts storage. Scale your outreach without scaling your costs.
安心の自己管理型（ゼロ・トラスト設計）
大切な顧客リストを弊社サーバーに過度に依存させず、お客様ご自身でJSON形式の完全データをバックアップ・管理できる設計を採用しています。
これにより、中央集権型サーバー特有のデータ消失・情報漏洩リスクを根本から排除し、極めて高いセキュリティと安心感を実現しました。
メール・LINEを1つの画面で一元管理
メールだけでなくLINE公式アカウントへの配信・問い合わせ対応も同じ画面で完結。窓口ごとに別ツールを開き直す手間をなくし、どの連絡先に何をいつ送ったかを一箇所で管理できます。
AIが問い合わせ返信の下書きを自動作成
ホームページ経由の問い合わせに対し、AIが内容を読み取って返信文の下書きを自動生成。担当者は内容を確認して送るだけなので、一次対応のスピードと品質が大きく向上します。ステップ配信も開封・クリックなどの行動に応じた高度な条件分岐に対応。
スムーズな導入プロセス
Step 1: Lead Gen
Bulk import your list and configure dedicated domains.
Step 2: Campaign Setup
Set up your sequence and launch.
Step 3: Close
Wait for hot leads to reply.
Why Mail Assist actually gets delivered (the technical reason)
The number one reason emails don't arrive is guilt by association — other users' spam on a shared server dragging your reputation down with it. We build in the latest authentication standards by default, giving you a clean sending environment.
An isolated environment via dedicated domain design
Prevents guilt-by-association spam flags from shared IPs. We build a sending domain environment that's entirely yours, fully compliant with SPF/DKIM/DMARC, maintaining high reputation with providers.
An intuitive UI that needs no manual
No complex English-only menus like overseas tools, no clunky legacy screens. A Notion-like editor and timeline UI let you build scenarios intuitively.
No more runaway usage-based pricing
Typical systems balloon in cost as your list or send volume grows. Our Business plan is a flat rate up to 10,000 contacts — the bigger your list, the better your margins.
Unbeatable ROI vs Legacy Tools
See why B2B businesses are switching to Mail Assist.
| Feature | Legacy Email Tools | Overseas high-end tools | Mail Assist |
|---|---|---|---|
| Behavior Tracking | Manual Management Only | Supported, but the entire settings UI is in English and hard to follow | Auto-detect Opens & Clicks |
| Deliverability | Shared IPs (High spam risk) | Shared IP (dedicated IP costs $700+/mo as an add-on) | Dedicated Domain Setup |
| Price for 10k Contacts | ~$130 to $150 / mo | Feature-rich but complex, with a steep learning curve | Flat $89 |
| Marketing Automation | Premium Tiers Only | Costs spike sharply with volume (often $300+/mo) | Advanced Step-Email Included |
| Migration support from your existing system | Manual export and CSV formatting required | Data migration and setup are largely self-service | One-click CSV import with 24/7 full AI support |
Simple Pricing. No Surprises.
No hidden fees. Every plan comes with a 14-day risk-free trial.
Starter
Perfect for validating your small-scale outreach.
- 連絡先 最大3,000件 (Max 3k contacts)
- 月間配信 15,000通 (15k sends/mo)
- ステップメール 3シナリオまで
- 配信レポート (Analytics)
- システムドメイン送信 (返信先設定可)
Business
Ideal for standard B2B sales teams.
- 連絡先 最大10,000件 (Max 10k contacts)
- 月間配信 50,000通 (50k sends/mo)
- ステップメール 10シナリオまで (10 MA)
- 独自ドメイン送信 (送信者認証対応)
- AIチャットサポート (AI Chat Support)
Enterprise
For high-volume sending and ultimate automation.
- 連絡先 無制限 (Unlimited Contacts)
- 月間配信 無制限 (Unlimited sends/mo)
- ステップメール 無制限 (Unlimited MA)
- 独自ドメイン送信 (送信者認証対応)
- 24/7 優先AIサポート (24/7 Priority AI Support)
Frequently Asked Questions
What is the Step-Email (Auto-Delivery) feature?
It automatically sends the most optimal emails in sequence based on pre-set rules or customer behavior, such as 'immediately after registration', '3 days later', or 'when a link is clicked'. It fully automates everything from lead nurturing to closing.
Will this actually improve my open rates?
Yes. By forcing dedicated domain setups and isolating your sending reputation from other users, your emails are far more likely to land in the primary inbox instead of spam.
Do I need technical skills to set this up?
Not at all. Our intuitive dashboard makes campaign creation a breeze, and we provide step-by-step guides for DNS configuration to ensure perfect deliverability.
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Special Offer
Limited time
Enter coupon code "LAUNCH10" in the "Add promotion code" field at checkout (valid through September 24, 2026).
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Risk Reversal
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Stop Wasting Leads. Start Closing Deals.
Get the all-in-one outreach platform that actually helps you grow.
Get Started For FreeNo credit card required. Setup takes minutes.
AIサポートデスク
こんにちは！Mail AssistのAIサポートです。料金プランや機能について、何でもお気軽にご質問ください。