Ship your MVP today.
Scale to millions tomorrow.
Launch on our $0 Hobby tier (3,000 emails/mo free). Scale to 100k emails for just $30/mo with sub-50ms Anycast delivery and direct Slack access to our core engineers.
Interactive Startup Runway Calculator
Founder Perks
Exclusive benefits for early-stage teams.
Up to $100 in Platform Credits
Free high-volume sending credits for bootstrapped and accelerator-backed startups. Never pay an infrastructure tax while finding product-market fit.
Sub-50ms Auth & 100% Primary Inbox
Your signup verification codes, magic links, and password resets arrive instantly in the user's primary inbox. Bypasses legacy SMTP bottlenecks with Anycast edge routing.
Private Engineer Slack Connect
Get a direct, shared Slack channel with Render25 core infrastructure engineers. Instant answers to DNS questions, SDK integrations, and deliverability tuning without support tickets.
Launch-Day Surge Protection
Planning a Product Hunt, Hacker News, or Twitter launch? Our MTA clusters automatically absorb 50,000+ instant verification requests with zero rate-limit queue delays.
Onboarding Velocity
From zero to your first send in 3 minutes.
Create API Key
Sign in with GitHub or email. Generate your production API key in 15 seconds with zero credit card requirements.
Verify DNS in 60s
Add 3 CNAME records to Cloudflare or Vercel. Automated DKIM, SPF, and DMARC alignment verified instantly.
Dispatch & Scale
Send transactional OTPs and receipts via REST API or SMTP relay with sub-50ms latency directly to the primary inbox.
5-Line Drop-In SDKs
Copy and paste directly into your project.
import { Render25 } from 'render25';
const r25 = new Render25(process.env.RENDER25_API_KEY!);
export async function POST(req: Request) {
const { email, code } = await req.json();
// Sub-50ms auth delivery from Vercel Edge / Server Actions
const { id } = await r25.emails.send({
from: 'auth@yourstartup.com',
to: email,
subject: `Your verification code: ${code}`,
html: `<h1>Your code is <strong>${code}</strong></h1>`,
});
return Response.json({ success: true, messageId: id });
}Claim your $100 startup credits
Open to YC, Techstars, Antler cohorts, and early-stage bootstrapped founders.
Founder Stories
Trusted by fast-moving engineering teams.
“We switched to Render25 two days before our Product Hunt launch. Our signup verification emails were hitting Gmail inboxes in under 40ms. Zero dropped users.”
“SendGrid was charging us $89/mo before we even had paying customers. Render25's startup program gave us $100 in credits and a private Slack channel with their engineers.”
“The Supabase and Next.js integration took 2 minutes. Deliverability has been 99.8% from day one without any manual IP warming headaches.”
Startup FAQs
Everything founders ask about deliverability, pricing, and limits.
Can my startup really stay on the Hobby tier for free?
Yes. The Hobby tier includes 3,000 emails every month (100/day) with 1 domain, 1 webhook endpoint, and 3 days of log retention at $0/month forever. No credit card is required to sign up.
What happens when our Product Hunt launch or viral spike happens?
On the Pro plan ($30/mo), there are zero daily caps. If your launch exceeds your included 100k email volume, extra emails are automatically delivered at just $0.80 per 1,000 emails with zero queue throttling or dropped packets.
How fast is DNS verification on Cloudflare or Vercel?
Instant. When you add your domain in Render25, we generate 3 simple CNAME records. Once added to Cloudflare or Vercel, verification happens in under 60 seconds with automated DKIM, SPF, and DMARC alignment.
Can we use Render25 for Supabase Auth and NextAuth?
Yes. Render25 provides both a modern REST API and a high-speed SMTP relay (smtp.render25.com:587) that drops seamlessly into Supabase Auth, NextAuth, Clerk, Auth0, or Firebase.
Ready to start sending?
Join thousands of developers building scalable, reliable email infrastructure.