Simple pricing. Start free.
Campaigns, a real reply inbox and an AI assistant that runs your mailbox — in one tool. Every plan includes AI assistant messages, or bring your own AI key and run it unmetered. Hosted sending, plus a cheaper BYO useSend option when you run your own delivery.
- 200 emails / month
- 30 AI assistant messages / month
- 100 marketing contacts
- Unified reply inbox
- AI assistant — finds, reads & triages your mail
- MCP server — Claude Code, Cursor, Codex
- Send from a Mailbase test domain
- 1 user
- 50,000 emails / month
- 500 AI assistant messages / month
- 5,000 marketing contacts
- Send from your own verified domain
- Campaigns + reply inbox
- AI assistant + intent tags
- Bring your own AI key — unmetered
- 2 users
- 150,000 emails / month
- 2,000 AI assistant messages / month
- 25,000 marketing contacts
- Everything in Starter
- A/B testing with automatic winner
- Deliverability analytics
- 5 users
- 500,000 emails / month
- 10,000 AI assistant messages / month
- 100,000 marketing contacts
- Everything in Growth
- Priority deliverability support
- Dedicated IP option
- 15 users
Bring your own useSend
Already self-host useSend? Connect your instance and pay only for the Mailbase workflow layer: every feature, while you cover delivery.
- Use your own useSend delivery stack
- Campaigns, inbox, A/B testing, analytics and MCP
- 5 users included
- Mailbase does not meter your sending volume
*Bring-your-own sending volume is limited only by your own useSend instance.
Transactional vs marketing pricing
Transactional email is priced by included email volume. Marketing email uses a contact limit plus a monthly send limit, so big lists stay predictable without turning the shared sending pool into unlimited blast traffic.
Transactional
Product email, auth, invoices, alerts, onboarding and lifecycle messages.
| Plan | Price | Limit | Positioning |
|---|---|---|---|
| Starter | €9/mo | 50,000 emails/mo | Managed sending with a verified sender domain |
| Growth | €29/mo | 150,000 emails/mo | For SaaS teams scaling product email |
| Scale | €79/mo | 500,000 emails/mo | High volume without jumping to enterprise pricing |
Marketing
Newsletters, launches, product updates and opt-in campaigns.
| Plan | Price | Limit | Positioning |
|---|---|---|---|
| Starter | €9/mo | 5,000 contacts + 50,000 emails/mo | Contact cap plus send cap keeps pricing fair |
| Growth | €29/mo | 25,000 contacts + 150,000 emails/mo | A practical middle tier for regular campaigns |
| Scale | €79/mo | 100,000 contacts + 500,000 emails/mo | For larger lists without contact-only billing shock |
Why Mailbase is predictable
Email stacks get expensive when sending, replies, campaign workflow, seats, A/B testing, analytics and AI assistance are priced as separate products. Mailbase keeps those workflows in a small set of plans, then lets technical teams use BYO useSend when they want to operate the delivery layer themselves.
Frequently asked
Is there a free plan?
Yes — 200 emails per month, free forever. No credit card. It's enough to try the inbox, campaigns and AI drafts end to end.
How should I compare Mailbase with other email tools?
Compare the whole workflow: sending limits, seats, reply handling, campaign creation, A/B testing, analytics, AI assistance, and whether you want managed delivery or your own useSend stack. Mailbase keeps those product workflows in one plan instead of asking you to stitch together separate tools.
Do I need my own useSend or email server?
No. On Starter and up, Mailbase sends through its own managed infrastructure — you just verify your sending domain. If you already self-host useSend, the Bring-your-own plan is cheaper since you run the delivery yourself.
Can I send from my own domain?
Yes. Add your domain and Mailbase shows you the exact DKIM/SPF records to set; sending unlocks once it verifies. The free plan sends from a shared Mailbase test domain.
What happens if I hit my monthly limit?
Sending pauses for the rest of the cycle — nothing is sent silently over your plan. Upgrade anytime to lift the limit immediately.
What does the Bring-your-own-useSend plan include?
Everything in the product — campaigns, inbox, A/B testing, analytics, MCP — for €5/mo. You connect your own useSend instance, so you cover delivery and we only charge for the Mailbase workflow layer.
How do AI assistant credits work?
Every plan includes a monthly pool of AI assistant messages (30 on Free, up to 10,000 on Scale) — one message is one question you ask the agent, including the searches and reads it runs to answer. When the pool is used up the assistant pauses until next cycle or you upgrade; nothing else is affected.
Can I use my own AI model or key?
Yes. Connect your own provider key (OpenAI, DeepSeek, OpenRouter, MiniMax, Groq, Mistral or any OpenAI-compatible endpoint) and the assistant runs on your account at your cost — completely unmetered, no monthly message cap. ChatGPT (Codex) sign-in is coming next.