Question 1

Is Cotera a Robotomail alternative?

Accepted Answer

Only for part of the job. Robotomail is mail infrastructure: an API that creates mailboxes your agents own, resolves threads, stores attachments, and tells you when something arrives over a webhook, an SSE stream, or a poll. What it does not include is the agent. Cotera is the opposite shape. You build an agent once and reuse it wherever the work turns up — in Slack, on a schedule, from a webhook, or at an email address of its own — so email is another way to interact with an agent rather than a separate build. Teams pick Robotomail when they are writing that agent themselves and pick Cotera when they are not.

Question 2

Can Cotera receive email like Robotomail?

Accepted Answer

For triggering work, yes. Add an email trigger and Cotera mints an address such as bugs-8ba1c7@inbound.cotera.ai. Anything sent, forwarded, copied, or blind-copied to it starts a run, and the message arrives as a normalized payload: sender, recipients, subject, both bodies, attachment names, and the SPF, DKIM, and spam-score results. The Message-ID doubles as the idempotency key, so a delivery that gets retried upstream does not run your workflow twice.

Question 3

What does Robotomail do that Cotera does not?

Accepted Answer

Robotomail keeps the mailbox. Threads are resolved and stored, attachments land in cloud storage behind presigned URLs, and each mailbox carries its own send limits and suppression list. It also provisions custom domains and configures DKIM, SPF, and DMARC for you. Cotera mints a trigger address rather than a browsable mailbox, records attachment filenames rather than their contents, and sends through whichever Gmail, Outlook, or SendGrid account you have connected. If your agent needs to own and search a real mailbox, that is Robotomail territory.

Question 4

How does pricing compare?

Accepted Answer

They meter different things. Robotomail prices mailboxes and volume, starting at $19/month for 10 mailboxes and 15,000 emails, then $79/month for 50 mailboxes and $199/month for 200, after a three-day trial. Cotera prices the work the agent does: $0 to start with 1,000 free credits and no card, and $500/month on the Team plan for 100,000 credits and unlimited seats. High mail volume across many mailboxes favours Robotomail. A handful of agents doing expensive reasoning and tool work favours Cotera.

Question 5

Do I still have to write code with Cotera?

Accepted Answer

No. With Robotomail the mailbox is an API call and the agent behind it is yours to write, deploy, and keep running. With Cotera you describe the agent in plain English, pick the tools it may use, and copy the address off the trigger card. The person forwarding mail to it is usually the one who used to handle those messages by hand.

Feature	Cotera	Robotomail
Agents get their own email address
Inbound email starts a run		Webhook, SSE, or polling
The agent itself is included
Built-in tool integrations	144
Multi-step reasoning and tool chaining
Durable execution that survives restarts
Build it without writing code
Schedule and webhook triggers too
Runs against your data warehouse
Stored mailbox with thread resolution
Attachment storage with presigned URLs
Custom sending domains with DKIM, SPF, DMARC
Per-mailbox send limits and suppression lists
Free tier	Yes (1,000 credits)	No (3-day trial)
Entry paid plan	$0 pay-as-you-go	$19/mo

Robotomail Sells the Mailbox. Cotera Sells What Reads It.

Feature Comparison

When to Choose Cotera Over Robotomail

You do not want to build the agent

The email is only the first step

Runs have to finish

Your team should own the automation

Frequently Asked Questions

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