MailStream
Free plan · From $99/moActively maintained
≈ 11visits/mo
Use not read yet · estimate, read Oct 13, 2026
- For
- Developers and AI agents sending physical mail, plus marketing teams running direct mail campaigns
- Price
- Free plan · From $99/mopricing page, read Oct 19, 2026
- Activity
- Actively maintainedsite updated 3 weeks ago
- Company
- Sponge Labs LLC · since 1998privacy policy · per their site
- Runs as
- API
- Used for
- Send postcards and letters through a single API call
- Mail every home within a chosen radius of an address
- Track each piece from printed to shipped to delivered
- Has an MCP server (1 in the registry)public registry →
Free plan · From $99/mo
- Founded1998per their site ↗
- Run bySponge Labs LLCprivacy policy ↗
- Certifications they stateSOC 2 Type II · HIPAA · GDPR · HITRUST · CCPAsecurity page ↗
- Data processing agreementpublishedDPA ↗
- Privacy policy updated2026-10-15privacy policy ↗
These are MailStream's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.
- MCP serverapp.mailstream/mailstreamverified in the MCP registry
- Stateanswers, requires sign-inchecked 2026-10-19
- Address to connectmy.mailstream.app/mcp
- API docsmailstream.app/developers/apithe vendor's page ↗
- MCP docsmailstream.app/developers/mcp-serverthe vendor's page ↗
This card as JSON, for your agent →
Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.
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betaThree tools from the Atlas for the job you describe, each with what fits and what does not.
No notes yet. What do you use MailStream for?
Sign in to leave a noteWhat is MailStream?
Prints and mails physical direct mail pieces through a REST API, MCP server or HTML-based design tool.
Who is MailStream for?
Developers and AI agents sending physical mail, plus marketing teams running direct mail campaigns
How much does MailStream cost?
MailStream has a free plan; paid plans start at $99/mo, per its pricing page on 2026-10-19.
Is MailStream free?
Yes, MailStream has a free plan, per its pricing page on 2026-10-19.
Is MailStream still maintained?
Actively maintained: site updated 3 weeks ago.
Who owns MailStream?
MailStream is run by Sponge Labs LLC, per its privacy policy (2026-10-19).
Is MailStream safe?
We do not audit vendors. What MailStream publishes, read 2026-10-19: SOC 2 Type II, HIPAA, GDPR, HITRUST, CCPA stated on its security page.
Does MailStream give refunds?
In its own words (terms of service, 2026-10-19): “Fees are non-refundable except where required by law or expressly stated in writing.”
Is MailStream HIPAA compliant?
MailStream states HIPAA compliance on its security page (2026-10-19). We have not verified it.
How we read a tool
No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.
- Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
- Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
- Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
- The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.
How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.
How we read every tool → · By INITE Atlas Desk
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