💰 Transparent Flat-Rate Pricing
One Price. All Mailboxes Covered.
No per-user licensing. No hidden overages. Pay a flat monthly fee based on your team size and archive away — storage included.
Starter
Solo entrepreneurs & micro-teams
$9 /mo
$99/year billed annually
- Up to 5 mailboxes
- 1 TB archive storage
- Smart attachment rules
- Secure download links
- Real-time dashboard
- Email support
Most Popular
Growth
Small businesses hitting storage limits
$19 /mo
$199/year billed annually
- Up to 25 mailboxes
- 2 TB archive storage
- Everything in Starter
- Priority email support
- Custom retention policies
- WORM compliance archive
Business Pro
Growing SMBs wanting a company-wide fix
$49 /mo
$499/year billed annually
- Up to 250 mailboxes
- 10 TB archive storage
- Everything in Growth
- Dedicated Slack channel
- Full-text search injection
- Litigation hold detection
Enterprise
Large orgs requiring InfoSec reviews
Custom
250+ mailboxes · Custom ACV
- Unlimited mailboxes
- BYOS (Bring Your Own Storage)
- Everything in Business Pro
- Dedicated account manager
- Custom DPA, MSA, SLAs
- Exchange Application Access Policies
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Managing multiple customer tenants?
Explore our Multi-Tenant MSP Partner Pricing & Wholesale Tiers →
💡 Quick Savings Math
A company with 25 users upgrading to higher tier enterprise plans ($23/user/mo) just to solve mailbox storage bloat spends $6,900/year extra. With Mailarch Growth at $199/year, you eliminate storage ceilings across all 25 mailboxes for a fraction of a single license upgrade — while keeping desktop Outlook running fast.
Frequently Asked Questions
No. Mailarch is 100% cloud-to-cloud. It connects to your Microsoft 365 tenant via the Graph API using standard OAuth admin consent. No desktop agents, no COM add-ins, no PowerShell scripts. Employees don't need to install or configure anything.
For the read-only scan: Reports.Read.All and Mail.Read. When you activate cleanup: Mail.ReadWrite (to remove attachments and update the email body with the download link). All permissions use Application-level (service-to-service) access via Entra ID admin consent — no individual user logins required.
No. During extraction, Mailarch injects the attachment's text content as a hidden HTML block inside the email body. This means Outlook desktop, OWA, and mobile search will still find keywords that existed inside PDFs, Word docs, or spreadsheets — even after the binary file has been moved to cloud storage.
Mailarch automatically detects S/MIME and PGP-signed emails via their MIME content-type headers and skips them entirely. Cryptographic signatures and message integrity are never affected.
No. Mailarch processes 50–100 emails per batch with the largest files first. This rate is well below the threshold where desktop Outlook's sync engine shows any visible activity. The initial backfill completes silently over 3–7 days with zero user disruption.
Before processing any mailbox, Mailarch runs a pre-flight check for LitigationHoldEnabled. If a hold is active, the admin is notified immediately. The original .eml is always preserved in a WORM-locked GCS bucket before any modifications, satisfying SEC 17a-4 and CFTC compliance requirements.
Storage is included in your plan. Under the hood, Mailarch uses Google Cloud Storage Archive class at $0.0012/GB/month. This means 1 TB of attachments costs approximately $1.20/month — which is why we can offer terabyte-scale storage pools at flat rates.
Yes. In the Mailarch dashboard, admins select which mailboxes to include using simple checkboxes. For enterprise customers requiring Microsoft-enforced restrictions, we support Exchange Application Access Policies that cryptographically limit our app to only specified security groups.