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CommsHarbor
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Email and customer relationships

Keep in touch. Know what arrived.

Bring your contacts, email and campaigns together. Choose who to reach, prepare your message and follow the result.

Photo: boats at the Praia do Peixe market wharf, Rio de Janeiro, by Marc Ferrez — Instituto Moreira Salles, public domain.

Start where you are

What do you need to do?

Three steps

From contact to result

  1. Start with the right people

    Organise contacts and their history. Create groups for campaigns and check who has agreed to receive them.

    Explore contacts →
  2. Prepare your message

    Set up your sending domain, choose a template and review recipients. Send a product email or schedule a campaign.

    Explore sends →
  3. Follow up with context

    See what was delivered, what failed and who opted out. Keep the history available to your team.

    Explore results →

Trial and availability

You can organise contacts and drafts as a visitor. Sending requires an enabled organisation; these are its catalogue limits.

Days
30
Sending domain
1
Contacts
1,000
Send allowance
5,000

The whole platform is limited to 1,000 real recipients per month, including trials. This limit takes priority over the send allowance.

Paid checkout is closed. Nothing renews automatically.

Pricing

Start with the free allowance. Each option’s limits and price are listed below; charges are shown before you continue.

WhatPrice
30-day sending trial for enabled organisations: one domain, 1,000 contacts and a 5,000-send allowance; the platform limit of 1,000 real recipients per month takes priorityFree

Want to sponsor or advertise here? Partnerships and sponsorship →

Frequently asked questions

Can I start today?

Yes. Open a temporary workspace without signing in to organise contacts and drafts. Link an account when you choose. Sending requires an enabled organisation; contact us with your sending domain.

What does the trial include?

Thirty days, one domain, 1,000 contacts and a 5,000-send allowance: each recipient uses one send, and a campaign that does not fit what is left is refused whole, never sent halfway. It includes email, permission-based campaigns and customer history. The platform-wide limit of 1,000 real recipients per month takes priority over that allowance. Nothing renews automatically.

Can I buy a plan?

Purchases are closed and nobody is charged. The catalogue lists a US$ 15 pass for 30 days and a US$ 10 top-up for 10,000 sends; these products are not yet available to buy.

How do I follow an email?

Check each message’s delivery state and the action history. Repeated attempts with the same send identifier do not create a new message. A delivery confirmation does not guarantee that the message reached the primary inbox.

How are unsubscribe requests respected?

Permission, preferences and blocking lists are checked at send time. People who leave the list do not receive new campaigns; blocks also apply to product messages.

Can I connect my product or agent?

Yes. Developers and agents has the API, usage guide and MCP. Calls use your signed-in account session or an organisation API key created in your account; keys do the work, never billing or erasure.

Can I sponsor, advertise or partner?

Yes. This product's placements, the suggested 30-day price and the proposal form are at /partners; we reply within 3 business days.