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Commercial Case / Software / Public Revenue

Keplars

Provides APIs for transactional and marketing email, an SMTP relay, webhooks, a visual editor, inbox warm-up, and delivery tracking, supports sending through Gmail/Outlook OAuth, and also has SDKs in 11 languages, automation flows, and an MCP service.

Visit official website ↗

THE BUSINESS IN NUMBERS

See the trend, not just the rank

1,6662026-10 · Ending MRR / USD
Historical trend, missing values left blank08851.8K2026-01:552026-02:1762026-03:902026-04:1082026-05:7982026-06:8402026-07:1,5172026-08:1,6312026-09:1,7702026-10:1,6662026-012026-10

Historical monthly records; Oct 2026 may be an incomplete month. MRR does not equal profit. Missing values left blank, negative values shown as recorded.

View period data
PeriodEnding MRR / USD
2026-0155
2026-02176
2026-0390
2026-04108
2026-05798
2026-06840
2026-071,517
2026-081,631
2026-091,770
2026-101,666
01 / PRODUCT & PEOPLE

Who does it serve and what problem does it solve?

Cheaper usage-based pricing than Resend, SendGrid, and Postmark: $1/month includes 5,000 transactional emails, and marketing email is charged by send volume rather than contact count

Target Audience

Indie developers, startup teams, and product teams who need to add signup verification codes, password resets, and invoice emails to their products, often using Next.js, Supabase, Firebase, Lovable, and similar tools

02 / BUSINESS MODEL

How does it charge?

subscription

Pulse $1/month (5,000 transactional emails); Orbit $5/month; Launch $10/month; Custom from $10/month; extra mailbox account $0.5, extra AI credits $1; 7-day free trial with no credit card

The above describes historical pricing. Check official website for current prices.

03 / ACQUISITION

Where do users come from?

Traffic estimate 2026-09: direct 38.8% is the top channel, organic search about 45.9%, referrals about 9%, paid 0%; 16 keywords, and the non-brand ones are all alternative-seeking terms like resend free tier, resend alternatives, and best email provider resend alternatives; the website has comparison pages for Resend, SendGrid, Postmark, Amazon SES, Mailgun, and others. The founder's self-reported channels on Revenue record: Product Hunt, word of mouth, Discord, partners, Cold DM, LinkedIn, X. It launched on Product Hunt twice, on 2026-04-01 and 04-29, went live on the Vercel Marketplace on 2026-03-10, and has an affiliate program and a partners page.

Channel share, initial acquisition, and growth drivers are distinct; correlation does not imply proven causation.

04 / YOUR NEXT QUESTION

What remains to be verified?

The following are research questions, not established market opportunities.

  • What do target users actually pay for? Is there direct user feedback or paid interview evidence?
  • Are these historical prices still active today? What are the conversion, retention, and fulfillment costs?
  • Is the "Traffic estimate 2026-09: direct 38.8% is the top channel, organic search about 45.9%, referrals about 9%, paid 0%; 16 keywords, and the non-brand ones are all alternative-seeking terms like resend free tier, resend alternatives, and best email provider resend alternatives; the website has comparison pages for Resend, SendGrid, Postmark, Amazon SES, Mailgun, and others. The founder's self-reported channels on Revenue record: Product Hunt, word of mouth, Discord, partners, Cold DM, LinkedIn, X. It launched on Product Hunt twice, on 2026-04-01 and 04-29, went live on the Vercel Marketplace on 2026-03-10, and has an affiliate program and a partners page." channel still viable? What resources do indie devs need to test it?
  • Whose needs are competitors failing to meet? Find specific evidence before deciding on your angle.

05 / BUSINESS EVIDENCE

Test stories with numbers

The following signals are used to audit cases, not to automatically validate product success or market opportunities.

1,666Snapshot MRR / USD (non-profit)
275Snapshot 30-day revenue / USD
2026-10-24Metric updated