The open-source email platform
useplunk.com Source★ 1,200AGPL-3.0-only DiscordMarketing / Email Marketing
- Monthly visits
- 32.3K
- Down21.1%MoMOct 2026
- Public revenue
- Undisclosed
- No public revenue evidence yet
- Entry price
- Usage-based
- No monthly subscription pricing
- Launched
- 4y ago
- 2022-07-25 · Est.
Traffic
Marketing moves
Launches, search & content, referrals, promotions- In 10 days, the old Plunk shuts down for good. 4 years ago it started everything. It outlived a lot of competitors. It never got a password reset. I have so many stories to tell about this one. Some day.
@driaug_ · 2026-10-21 · 28 likes · 0 reposts · 1,259 views
Launched on Show HN (10 pts · 10 comments)Launch
I turned my email automation tool into a full-fledged email platform — Around 10 months ago, I published a tool I made ( ). I was scouring the market for an affordable and easy-to-use email automation tool, to…
Jun 9, 2023 · 3y agoLaunch page
Launched on Show HN (109 pts · 60 comments)Launch
I built an email marketing tool made for indie hackers and solopreneurs
Jul 25, 2022 · 4y agoLaunch page
Third-party reviews & case dossiers
Acquisition breakdowns, engineer reviews & open-source metrics- Post excerpt:
- Around 10 months ago, I published a tool I made ( https://news.ycombinator.com/item?id=32229278 ). I was scouring the market for an affordable and easy-to-use email automation tool, to no avail. The solution? I decided to just build it myself. Since then, I've added the ability to send transactional and broadcast emails, threw out the subscription pricing an
Open Source & Agent Ecosystem
- GitHub Stars
- ★ 1,200
- Forks
- 120
- License
- AGPL-3.0-only
- Primary language
- JavaScript
- Ecosystem & integrations:
- OutlookApple MailClaudeCursor
Traffic sources
Traffic breakdown
Channels
- Direct41%
- Organic Search32%
- Referrals10%
- Social6%
- Other11%
Countries
- United States39%
- Germany13%
- Brazil12%
- India9%
- Spain8%
Search
Domain authority —Domain registered 2022-06-16
| Keyword | Monthly volume |
|---|---|
| plunk | 5,150 |
| plunk email | 310 |
| plunk self hosted | 130 |
| free resend alternative | 110 |
| plunk sql | 80 |
Traffic data: Vaneform
Pricing
Trial: None · Observed 2026-11-11 · Pricing page
Pages & changes
Key pages
Weekly snapshotsChanges
Design
Minimal Monochrome (Light canvas, airy density) featuring centered headline + cta layout and pure typography & geometry visuals.
First-screen preview · click to zoom
First-screen pitch & conversion flow
“The open-sourceemail platform”
Centered Headline + CTA hero structure paired with start free / sign up CTA and no explicit trust bar.
Conversion path: Centered Headline + CTA + Pure Typography & Geometry → Start Free / Sign Up
- Category Positioning Anchor
Palette · click to copy
- Typography
- 8.0
- Color & Contrast
- 8.0
- Layout & Spacing
- 8.0
- Craft & Polish
- 7.0
- Distinctiveness
- 6.0
Structure
- Fonts
- Funnel Display / ui-sans-serif
- Hero layout
- Centered Headline + CTA
- Primary visual
- Pure Typography & Geometry
- Conversion CTA
- Start Free / Sign Up
- Social proof
- No Explicit Trust Bar
- Navigation
- Full-Width Top Bar
- Theme & density
- Light · Airy
- Corners & depth
- Medium Radius · Hairline borders
Preview full AI design brief (includes :root CSS variables & layout rules)Style tokens only; never copy brand names, logos, copy, or images
# Design Brief: Minimal Monochrome
Monochrome palette with a single accent color, hairline dividers, and generous whitespace.
## Design Tokens
```css
:root {
--background: #ffffff;
--surface: #f3f3f3;
--foreground: #111827;
--muted-foreground: #7c8088;
--accent: #111827;
--radius: 8px;
--font-heading: "Funnel Display", ui-sans-serif, system-ui, sans-serif;
--font-body: "ui-sans-serif", ui-sans-serif, system-ui, sans-serif;
}
```
Color area ratio: Background #FFFFFF (~73%) · Surface #F3F3F3 (~15%) · Text #111827 (~6%) · Muted Text #7C8088 (~4%) · Accent #111827 (~2%). Background and surface dominate the canvas; reserve the accent color for primary buttons and active states.
## Layout & Conversion Structure
- Hero layout: Centered Headline + CTA
- Navigation: Full-Width Top Bar
- Theme & density: Light · Airy
- Border radius & elevation: Medium Radius; no drop shadows—separate layers with hairline borders and whitespace
- Primary visual medium: Pure Typography & Geometry
- Conversion CTA: Start Free / Sign Up
- Headline hook: Category Positioning Anchor
- Spatial layout notes: Centered Headline + CTA hero structure paired with start free / sign up CTA and no explicit trust bar.
- Visual summary: Minimal Monochrome (Light canvas, airy density) featuring centered headline + cta layout and pure typography & geometry visuals.
## Avoid
- Multi-stop neon gradients
- Heavy drop shadows
- More than one competing accent color
Implement the UI following the design tokens and layout specifications above: use only these color variables, and reserve the accent color strictly for primary actions and active states. Adopt only this visual style—never copy any reference product’s brand name, logo, copy, or imagery.
Questions & evidence
- How much does Plunk cost?
- Free forever: Free forever; Pay as you grow: $0.001/ email. Observed 2026-11-11. Check the source for current billing terms, usage limits and taxes.Source
- How much website traffic does Plunk get?
- Vaneform estimates 32.3K website visits in 2026-10. Visits can include repeat visits; this estimate measures web traffic separately from paying customers or revenue.Source
- What is Plunk and what platforms does it support?
- Plunk is catalogued under Email Marketing: The open-source email platform. Supported platforms: MCP Server, API.
- Is Plunk open source?
- Plunk has a public repository (https://github.com/useplunk/plunk) under the AGPL-3.0-only license, recording 1,200 GitHub stars.Source
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