Email delivery made simple for SaaS & AI
sidemail.io Software Development / Domains, DNS & Email Delivery
- Monthly visits
- 17.7K
- Down5.8%MoMSep 2026
- Public revenue
- Undisclosed
- No public revenue evidence yet
- Entry price
- $19/mo
- Higher than 74% of peersNiche median $10/mo
- Launched
- 6y ago
- 2020-10-01 · Est.
Traffic
Marketing moves
Launches, search & content, referrals, promotionsLaunched on Product HuntLaunch
Free email address validator (inc. SMTP deep check)
Feb 1 · 10mo agoLaunch page
Launched on Product HuntLaunch
Let AI agents write & manage your SaaS emails
Dec 14, 2025 · 11mo agoLaunch page
Launched on Show HN (1 pts)Launch
Sidemail – Email platform for SaaS (email API, newsletters, automation) — Hi all! I'm Kristyna, maker of Sidemail. I'd love to share with you what we've been building. We built Sidemail because sending emails fro…
Nov 23, 2025 · 12mo agoLaunch page
Third-party reviews & case dossiers
Acquisition breakdowns, engineer reviews & open-source metrics- Post excerpt:
- Hi HN! Kristyna here. I built this free churn calculator and would love to share it with you. It calculates SaaS churn (including retention, net growth rate, GRR, NRR) and generates a nice shareable JPG from the results that you can use for investor updates, standups, or social posts. Why this calculator? - It calculates churn and other business metrics fast
- Post excerpt:
- Hi HN – Kristyna here. I built this free, online email validator and would love to share it with you. What it checks: - Syntax – Confirms correct proper email format. - Domain & DNS – Verifies the domain exists and resolves. - MX records – Verifies the domain can receive mail. - SMTP handshake (optional) – Checks the mail server accepts the recipient (no mes
- Post excerpt:
- Mailbox providers are tightening up sender requirements for authentication, making DMARC crucial for bulk sending. I made a DMARC validator where you can check out whether your setup is valid or needs any improvements. It looks up _dmarc.<domain>, parses the TXT record, and displays policy (p/sp), alignment (adkim/aspf), reporting (rua/ruf), and options like
- Post excerpt:
- Hi all! I'm Kristyna, maker of Sidemail. I'd love to share with you what we've been building. We built Sidemail because sending emails from a SaaS app was way harder than it should be. Sidemail is made for developers and teams that want one simple place to handle SaaS emails with reliable delivery and no bloat. It has: - Everything for creating, managing and
MCP Server & Agent Ecosystem
Traffic sources
Traffic breakdown
Channels
- Direct40%
- Organic Search33%
- Referrals10%
- Social6%
- Other10%
Countries
- United States22%
- India12%
- United Kingdom10%
- Australia7%
- Indonesia7%
Search
Domain authority —Domain registered 2018-04-22
| Keyword | Monthly volume |
|---|---|
| email validator | 19K |
| free email list verification tool | 150 |
| email notification generator | 90 |
| email format validator | 70 |
| side mail | 70 |
Traffic data: Vaneform
Pricing
Trial: Try it free for 7 days. · 1 paid tier ($19) · Up to 26% off annually · Observed 2026-11-04 · Pricing page
Entry price $19/mo, Higher than 74% of peers; “Domains, DNS & Email Delivery” median is $10/mo.View pricing benchmark
Pages & changes
Key pages
Weekly snapshots- Homesidemail.io/
- Pricingsidemail.io/pricing/ Snapshot 2026-11-04
- Featuressidemail.io/email-sending-api/ Snapshot 2026-11-04
Changes
Design
Enterprise Clean (Light canvas, balanced density) featuring centered headline + cta layout and illustration / character art visuals.
First-screen preview · click to zoom
First-screen pitch & conversion flow
“Email delivery made simple for SaaS & AI”
Centered Headline + CTA hero structure paired with start free / sign up CTA and stacked avatars & testimonials.
Conversion path: Centered Headline + CTA + Illustration / Character Art → Start Free / Sign Up · Trust bar: Stacked Avatars & Testimonials
- Pain Relief & Replacement
- Custom Illustration
- Metrics Strip
Palette · click to copy
- Typography
- 8.0
- Color & Contrast
- 8.0
- Layout & Spacing
- 8.0
- Craft & Polish
- 8.0
- Distinctiveness
- 7.0
Structure
- Fonts
- Georgia / Inter
- Hero layout
- Centered Headline + CTA
- Primary visual
- Illustration / Character Art
- Conversion CTA
- Start Free / Sign Up
- Social proof
- Stacked Avatars & Testimonials
- Navigation
- Full-Width Top Bar
- Theme & density
- Light · Balanced
- Corners & depth
- Small 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: Enterprise Clean (with Soft & Friendly)
Trustworthy blue-anchored palette, structured grids, and prominent customer logo walls.
## Design Tokens
```css
:root {
--background: #f8fafc;
--surface: #ffffff;
--foreground: #173452;
--muted-foreground: #71849a;
--accent: #0798e8;
--radius: 4px;
--font-heading: "Georgia", ui-sans-serif, system-ui, sans-serif;
--font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
}
```
Color area ratio: Background #F8FAFC (~67%) · Surface #FFFFFF (~15%) · Text #173452 (~9%) · Muted Text #71849A (~6%) · Accent #0798E8 (~3%). 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 · Balanced
- Border radius & elevation: Small Radius; no drop shadows—separate layers with hairline borders and whitespace
- Primary visual medium: Illustration / Character Art
- Conversion CTA: Start Free / Sign Up · Trust bar uses Stacked Avatars & Testimonials
- Headline hook: Pain Relief & Replacement
- Hero components: Custom Illustration, Metrics Strip
- Spatial layout notes: Centered Headline + CTA hero structure paired with start free / sign up CTA and stacked avatars & testimonials.
- Visual summary: Enterprise Clean (Light canvas, balanced density) featuring centered headline + cta layout and illustration / character art visuals.
## Avoid
- Experimental navigation patterns
- Low-legibility decorative fonts
- Visual novelty that obscures the value proposition
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 Sidemail.io cost?
- All-inclusive: $19/mo (annual billing available). Observed 2026-11-04. Check the source for current billing terms, usage limits and taxes.Source
- How much website traffic does Sidemail.io get?
- Vaneform estimates 17.7K website visits in 2026-09. Visits can include repeat visits; this estimate does not measure paying customers or revenue.Source
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