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CobraLedger Mail Archive

Your Microsoft 365 email,
backed up & archived without limits.

CobraLedger Mail Archive automatically captures every message into a fully managed backup and archive with unlimited storage — searchable, exportable in open .eml format, and never locked in.

Start here… See pricing

Mailboxes fill up. Staff leave. Compliance calls.

Microsoft 365 keeps your live mailboxes running — but it was never built to be a long-term, tamper-evident record of every email your business sends and receives. Retention gaps, deleted items, departed employees, and legal or regulatory requests all create the same question: can you still find that email? CobraLedger Mail Archive makes sure the answer is always yes.

Set it up once. It runs on its own.

Four steps from connection to a continuously growing backup & archive you control.

1

Connect Microsoft 365

Securely link your tenant with modern certificate-based authentication. We request read-only access to mail — nothing more.

2

Choose your mailboxes

Pick which mailboxes to back up and archive. Scope access precisely, right down to the individual mailbox.

3

We back up & archive everything

New mail is captured continuously into your dedicated archive — fully managed by the platform, unlimited storage, in standard .eml format.

4

Search & download anytime

Use the web portal to find any message in seconds and download it whenever you need it.

Built on one principle: it's your data.

Ownership, isolation, and read-only access — by design, not as an afterthought.

Unlimited storage, zero setup

The platform manages all archive storage for you — no storage accounts to provision, no capacity to plan, no per-GB fees. Every message is kept in open .eml format, not a proprietary vault, so you can export your data and leave anytime.

Hard tenant isolation

Every customer gets a dedicated, physically separate archive database. Your data never shares a table with anyone else's.

Find anything, instantly

Searchable metadata means locating a message takes seconds — no scanning mailboxes, no waiting.

Read-only by design

We connect with certificate-based app authentication and request only the access needed to read mail. We never modify, send, or delete your email.

Effortless onboarding

Connect, select mailboxes, done. Archiving begins automatically.

Security & data ownership

It's your data — and we built the product to keep it that way.

CobraLedger Mail Archive connects to Microsoft 365 with modern certificate-based app authentication and requests read-only access to mail — nothing more. We never modify, send, or delete your email. Your archive is stored in the platform's fully managed storage with unlimited capacity, in open .eml format — so while we run the storage, the data stays portable and yours: export any message, or your whole archive, whenever you want. Every customer also gets a dedicated, physically separate archive database, so your data never shares a table with anyone else's.

Certificate-based authModern app authentication to your tenant.
Read-only scopeOnly the access needed to read mail.
Dedicated databasePhysically separate per customer.
No lock-inOpen .eml — export anytime.
For MSPs and Partners

Manage every client's email backup & archive from one console.

If you manage Microsoft 365 for your clients, the CobraLedger MSP Console gives you a single view across your whole book of business — no logging into each client's account one at a time.

All your clients at a glanceMailbox counts, archive health, and sync status for every client you manage, in one dashboard.
One alerts feedSync failures, stale mailboxes, connection problems — aggregated across all your clients, so nothing gets missed.
Control mailbox archivingTurn archiving protection on or off for any mailbox, for any client you manage, without leaving the console.
Sign in with MicrosoftNo extra passwords. Access is invite-only.
Transparent by designEvery change you make is logged with a full audit trail, and both you and your client are emailed automatically — so your clients always know what changed and who changed it.
MSP Login →

Access is invite-only. Not a partner yet? Talk to us →

Simple per-mailbox pricing.

Unlimited storage on every plan. 14-day free trial. Choose monthly, or save with annual billing.

Free Forever

Get started at no cost — the core archive, unlimited storage included.

$0 / mailbox / mo
Free forever · no credit card
  • Unlimited archive storage
  • Advanced search & bulk export
  • Email alerts
Start free…
Most popular

Starter

Production archiving for a growing business — unlimited storage included.

$1.19 / mailbox / mo
or $11.88 / mailbox billed annually ($0.99 / mailbox / mo)
  • Unlimited archive storage
  • Advanced search & bulk export
  • Email alerts
  • 14-day free trial
  • 5-mailbox minimum
Start here…

Business Plus

For teams that need compliance, priority support, and shared mailboxes.

$2.00 / mailbox / mo
or $20.00 / mailbox billed annually ($1.67 / mailbox / mo)
  • Everything in Starter, plus:
  • Compliance reports
  • Priority support
  • Shared mailboxes
  • Change notifications
  • PST export
Start here…

All prices are per mailbox. Free Forever $0; Starter $0.99/mo billed annually ($11.88/yr) or $1.19/mo monthly; Business Plus $1.67/mo billed annually ($20.00/yr) or $2.00/mo monthly.

Questions, answered.

Where exactly is my email stored?
In the platform's secure, fully managed archive storage — there's nothing for you to provision or configure. Every message is saved in standard open .eml format, and every customer gets a dedicated, physically separate archive database. You can export any message — or your whole archive — whenever you want.
Is storage really unlimited?
Yes. There's no storage cap and no per-GB fees — pricing is per mailbox, and the platform manages all archive storage for you. Archive as much mail as your business generates, for as long as you subscribe.
Do I need to bring my own storage account?
No. Storage is included and fully managed by the platform — you don't need a SharePoint site, a storage account, or a bucket anywhere. Connect Microsoft 365, pick your mailboxes, and archiving begins.
Does this delete or change anything in my mailboxes?
No. Access is strictly read-only. We copy mail into your archive; we never modify, move, send, or delete anything in your live mailboxes.
How secure is the connection to Microsoft 365?
We use modern certificate-based app authentication and request only read access to mail. Access can be scoped to just the mailboxes you choose.
How is my data kept separate from other customers?
Every customer gets a dedicated, physically separate archive database. Your searchable index is never mixed with anyone else's data.
Can I search old email quickly?
Yes. We index searchable metadata so you can find any archived message in seconds and download it directly from the web portal.
Is there a minimum or a free trial?
The paid plans include a 14-day free trial and start at a 5-mailbox minimum. Free Forever has no minimum and needs no trial — it's free indefinitely.
How much does it cost?
Three plans, all with unlimited storage: Free Forever at $0, Starter at $0.99 / mailbox / mo billed annually ($11.88 / mailbox / yr) or $1.19 monthly, and Business Plus at $1.67 / mailbox / mo billed annually ($20.00 / mailbox / yr) or $2.00 monthly. Paid plans add a 14-day free trial and start at a 5-mailbox minimum.
Is this a backup of my whole Microsoft 365?
No — it's a dedicated email archive focused on long-term retention, ownership, and search.

Start backing up & archiving your Microsoft 365 email today.

Unlimited storage, fully searchable, always exportable. Be up and running in minutes.

Start here…