not read yet
Use
- For
- Marketers, agencies and SaaS teams building a private swipe file of competitor marketing emails.
- Price
- Free plan · From $9/mopricing page, read 2026-10-14 ↗
- Activity
- Actively maintainedsite updated 5 weeks ago
- Company
- Domain since 2026domain registered
- Collect brand newsletters through a dedicated private address
- Search saved emails by subject, brand, date or text
- Ask an AI assistant questions about your saved emails
- Domain since2026domain registered
- MCP serverapp.promostash/promostashverified in the MCP registry
- Stateanswers, requires sign-inchecked 2026-10-14
- Address to connectwww.promostash.app/api/mcp
- MCP docspromostash.app/features/email-archive-mcpthe vendor's page ↗
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.
Figure and bar: visits/mo, estimate · year: online since
- #1
Brew
Generates on-brand marketing emails from natural language prompts and automates lifecycle campaigns.
99kActiveFrom $99/mo - #2
ChampSignal
Monitors competitor websites, emails, news, ads and search rankings, alerting on pricing and positioning changes.
1.5kActiveFree plan - #3
Engain
Finds Reddit threads where customers want to buy, posts comments from aged accounts, and upvotes them to top.
542ActiveFrom $199/mo2024 - #4
NativePortMCP · sign-in
Gives AI agents callable tools that read social media, search data, maps and reviews, and route hard questions to larger models, billed per call.
45ActiveFrom $0.00 per use - #5
MailzzyMCP · sign-in
Builds and sends email campaigns, drafting copy with generative models, A/B testing subject lines, and connecting to AI assistants through MCP.
21ActiveFrom $9/mo - #6
Greater Than Services
Tracks what AI assistants cite about your business and recommends content changes to appear in their answers.
15ActiveFrom $49/mo2025
What is PromoStash?
Stores marketing emails sent to a private address in a searchable archive that compatible AI tools can query through MCP. It is listed in the Atlas under Marketing.
Who is PromoStash for?
Marketers, agencies and SaaS teams building a private swipe file of competitor marketing emails.
How much does PromoStash cost?
PromoStash has a free plan; paid plans start at $9/mo, per its pricing page on 2026-10-14.
Is PromoStash free?
Yes, PromoStash has a free plan, per its pricing page on 2026-10-14.
Do people use PromoStash?
Little sign of use.
Is PromoStash still maintained?
Actively maintained: site updated 5 weeks ago.
What are alternatives to PromoStash?
In Marketing, by use: Brew, ChampSignal, Engain, NativePort, Mailzzy, Greater Than Services.
Not quite it? Describe the job
betaFive tools from the Atlas that fit it, each judged against what you wrote.
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.