KoltrixWhat Koltrix Doesn't Do Yet, and Who Should Wait
An honest list of what Koltrix v1 doesn't include, from IMAP and importers to SOC 2 and SDKs, and the teams for whom waiting or choosing another tool is right.
On this page(8 sections)
- Mail clients and migration
- No IMAP or POP access
- No mailbox importer
- No native mobile app
- Security and compliance
- No third-party certification
- Off-site backups aren't running yet
- One region
- Sending and developer tools
- No first-party SDKs
- No dedicated sending IP
- No newsletter or campaign product in v1
- No warm-up dial or blocklist dashboards
- Not an office suite
- The whole list in one place
- Who Koltrix does fit today
- How to use this list
- Key takeaways
Every product page tells you what a tool does. Fewer tell you what it doesn't, and that's usually the information that decides whether a migration goes well. So here's the other half of the Koltrix story: what v1 doesn't include, and who should wait or pick something else because of it.
I'd rather you read this before signing up than discover it during week one.
Mail clients and migration
No IMAP or POP access
Koltrix is a web app today. You can install it to your phone's home screen, but there's no IMAP or POP access for Outlook, Apple Mail, Thunderbird or a native mobile mail client. IMAP and SMTP access for desktop and mobile clients is planned for the release after launch, not v1.
Who should wait: teams where people rely on a desktop client, especially Outlook, and wouldn't switch to a browser tab. Forcing a mail-client change on a team is a fast way to make them hate a tool, however good it is.
No mailbox importer
There's no automatic importer for your existing mail yet. Pulling old mail across over IMAP is planned for the release after launch. Until then, our Google Workspace migration checklist suggests keeping the old mailbox alive and read-only for as long as you need the archive, and exporting it before you cancel.
Who should wait: teams who need years of history searchable in the same place as new mail from day one.
No native mobile app
Koltrix installs to the home screen as a web app. If your team works mostly from phones and expects a native app from an app store, that's a real gap.
Security and compliance
No third-party certification
We have no SOC 2, no ISO 27001, and no other third-party certification. We haven't been audited. We also have no SSO or SAML, and no published penetration test.
Who should choose something else: anyone whose customers or procurement process require a named certification or SSO. That isn't a box you can work around with a nice conversation, and I don't want you to try.
Off-site backups aren't running yet
Our security page says this plainly, so I will too: off-site backups are being set up. Until we say they're running, don't treat Koltrix as your only copy of business-critical mail. You can export everything at any time.
One region
Koltrix runs on our own servers on OVHcloud in Frankfurt, Germany. There's no choice of region. If you need data stored in a specific country outside the EU, we can't offer that.
Sending and developer tools
No first-party SDKs
The sending API is REST, plus an SMTP relay. It's documented with curl, JavaScript, Python and Go examples, but there are no first-party SDK packages and no template framework. If your team wants an official SDK in its language and a component-based template system, a developer-first sending service may suit you better. We've written about that trade-off on our Resend comparison page.
No dedicated sending IP
Sending happens from shared infrastructure. There's no dedicated IP option. Teams sending at very high volume who want to manage their own IP reputation should look elsewhere.
No newsletter or campaign product in v1
Koltrix doesn't include a campaign builder, audience segmentation, or drip automation in v1. Newsletters in the app are planned for the next release. Today, lifecycle email means your application deciding when to send and calling our API or SMTP relay. If a non-technical teammate needs to run campaigns, you'll want a marketing platform alongside or instead.
No warm-up dial or blocklist dashboards
We don't offer a configurable warm-up setting or blocklist monitoring dashboards. Per-plan sending caps, enforced by the API, do the protective job a warm-up dial would, without a control that looks broken.
Not an office suite
Koltrix is email. There's no calendar, no contacts sync, no documents, no video calls. If you need Docs, Sheets, Calendar and Meet, you need Google Workspace or Microsoft 365, and Koltrix isn't a replacement for either.
The whole list in one place
| Not in v1 | Status |
|---|---|
| IMAP / POP for desktop and mobile clients | Planned for the next release |
| Mailbox importer over IMAP | Planned for the next release |
| Newsletters in the app | Planned for the next release |
| Native mobile app | Web app installable to the home screen |
| SOC 2, ISO 27001 or other certification | Not audited |
| SSO / SAML | Not available |
| Off-site backups | Being set up; export available any time |
| Region choice | Frankfurt only |
| First-party SDKs | REST and SMTP, with examples |
| Dedicated sending IP | Not available |
| Calendar, contacts, office suite | Out of scope |
Who Koltrix does fit today
With all of that said, here's who I think should try it now:
- Small SaaS teams whose product sends email and who want the team inbox and the sending API on one domain, one set of DNS records and one bill.
- Founders buried in cold pitches, who'd benefit from Pitch Shield screening strangers before they hit the main inbox.
- Teams tired of losing replies to
noreply@. Every message sent through Koltrix carries a signed reply address, so replies to receipts and password resets land in the team inbox, threaded under the original message. - People comfortable working in a browser with keyboard shortcuts rather than a desktop client.
- Teams who want AI help that drafts but never sends. No tool in the agent runtime can send, forward or delete a message.
Pricing is per workspace with seats included, and there's a 7-day trial with no card required. The details are on the pricing page.
How to use this list
If one item in the table is a hard requirement for you, take it seriously and choose accordingly. If an item is a preference rather than a requirement, a week-long trial is the cheapest way to find out whether it matters in practice. And if something on the "planned" list is what's holding you back, it's reasonable to wait for it.
Key takeaways
- Koltrix v1 has no IMAP/POP access, no mailbox importer, no native app, no certification, no SSO, no SDKs, no dedicated IP and no newsletter product.
- Off-site backups aren't running yet, so keep your own export of critical mail.
- If a named certification, SSO or desktop mail clients are hard requirements, choose another provider for now.
- Koltrix fits small SaaS teams that want inbox and product email on one domain, with AI that drafts and never sends.
Start with Koltrix
Your domain, one inbox, and an API that sends.
A team inbox where AI sorts and drafts (nothing is sent without your click), plus the transactional API and SMTP relay your product sends with. 7 days free, no card.
