A second free example of the $79 48-hour competitor teardown. Same format: who they are, three named competitors, five openings.

Who they are

Resend is a developer-first email API for transactional and marketing send. It began as react.email in 2022, incorporated in January 2023, and came out of Y Combinator Winter 2023. Founders are Zeno Rocha, Bu Kinoshita, and Jonni Lundy. Fully remote. $3M seed (April 2023), $18M Series A led by a16z (4 December 2024). On 3 June 2026: 3,000,000 users, 43 people, profitable. REST + SMTP, SDKs, inbound, broadcasts, React Email, agent tooling. Money is transactional-by-send plus marketing-by-contacts, plus Scale add-ons.

Three competitors

Postmark — postmarkapp.com. Same job: transactional REST/SMTP, inbound, templates, webhooks. Postmark stays deliverability-first (Basic $15/mo for 10,000 emails; 45-day retention). Resend also sells contact-priced marketing broadcasts on the same account.

Mailgun — mailgun.com. Same job: developer email API + SMTP + inbound + dedicated IPs. Resend publishes an official Mailgun migrate guide. Mailgun also sells validation, inbox-placement add-ons, US/EU residency, and live phone/chat on Scale ($90/mo, 100,000 emails).

Amazon SES — aws.amazon.com/ses. Same job at the infrastructure layer. Overlap is volume transactional mail. SES does not sell Resend’s React Email / dashboard DX. Resend has no SES migrate guide.

Five openings

1. Volume price vs SES. Resend Scale at 1M emails is $650/mo. SES Essentials is $0.16/1,000 ($160 at 1M). À la carte outbound is $0.10/1,000 ($100 at 1M).

1. Free-tier daily cap. Headline is 3,000 emails/mo at $0, but Free is hard-capped at 100 emails/day. A launch-day burst dies before the monthly allowance.

1. 30-day retention on every published plan. Including Scale at $1,150/mo for 2.5M emails. Postmark default is 45 days, customizable to 365.

1. Dedicated IPs are gated. $30/mo, Scale-only, and only if you exceed 3,000 emails/day. SES Standard dedicated IPs are $24.95/IP/mo with no published daily-send gate.

1. Missing SES migrate page. /migrate lists Customer.io, Mailchimp, Mailgun, Postmark, and SendGrid. resend.com/migrate/ses.md is 404.

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Want one on your company? $79: https://whop.com/checkout/plan_KxyN5af4F4n2y · $29: https://whop.com/checkout/plan_b4Q5UrzKTobfE · $9 DIY: https://whop.com/checkout/plan_KqcyopoAhxd5C

You paid $9. This is the whole product. No call, no wait.

Use this when you want to run a teardown yourself in an afternoon. If you want us to do it, that’s the $79 brief.

1. Who they are (one paragraph)

• What they sell

• Who pays

• How they charge (seat, usage, one-time)

• Write it in 80–120 words. Cut adjectives.

2. Three named competitors

For each, write:

• Name + URL

• The actual overlap (same job, not the same industry)

• Who they win, who they lose

Do not list Google, Amazon, or “Excel” unless that is really the substitute.

3. Five openings

Each opening needs a proof point you can screenshot:

• A pricing cliff (feature gated 2× up the stack)

• A comparison page they are missing

• A keyword they rank for with a thin page

• A feature the category leader ships on free/low and they do not

• A buyer they ignore (coaches, HIPAA, embeds, agencies)

4. Ship rule

If you cannot name the rival and the proof in one sentence, it is not an opening.

A free example of the $79 48-hour competitor teardown. Same format you get if you buy: who they are, three named competitors, five openings. Sources at the bottom.

Who they are

Cal.com, Inc. sells hosted scheduling: booking pages, team routing, embeds, and Cal.ai phone agents. Buyers are individuals on the free plan, sales and success teams, healthcare orgs that need a BAA, and product teams embedding scheduling. Money comes from per-seat SaaS—Teams at $12/user/month and Organizations at $28/user/month on annual billing (badged “Save 25%”), custom Enterprise, and Cal.ai at $0.29/minute. The free plan is one user, unlimited event types, Stripe/PayPal, and two-way Salesforce and HubSpot. Production code went closed-source on 14 April 2026; Cal.diy is the MIT self-host fork, marked personal / non-production.

Three competitors

Calendly — calendly.com. Same job: booking links, round-robin, routing, CRM. Calendly wins CRM-heavy sales orgs: Salesforce send plus Marketo/Pardot on Teams at $16/seat/month (annual); meeting polls on Free; Notetaker and Callie (email AI) as add-ons; Enterprise from $15,000/year. Cal.com wins the solo user (unlimited event types vs Calendly’s one) and the $12 vs $16 Teams seat.

SavvyCal — savvycal.com. Same job, different surface: round-robin, collective, paid bookings, team links. SavvyCal wins executives, recruiters, and consultants on recipient UX—calendar overlay and unlimited meeting polls on Basic at $10/user/month (annual); custom domains, assistant delegate, and paid bookings on Premium at $17. Cal.com wins routing, HIPAA/SSO, and the cheaper team seat.

TidyCal — tidycal.com. Overlap is the solo booking page and paid appointments. TidyCal wins coaches and freelancers who want to own the tool: Individual Lifetime $29 (AppSumo), Agency Lifetime $79 with round-robin, Pro $99/year with no branding and a custom domain. Free already includes package bookings, subscriptions, discount codes, and a digital storefront. Cal.com wins if they later need CRM routing or a signed BAA.

Five openings

1. SSO/HIPAA cliff. SAML SSO, SCIM, SOC 2, HIPAA, and ISO 27001 sit on Organizations at $28/user—more than double Teams at $12. A BAA is included there; on a lower plan it is $300/month. Put SSO on a Teams-priced SKU.

1. Embed platform is closed. As of 15 December 2025, Cal.com stopped new Platform signups (docs: deprecated, existing customers only). Cal.diy’s GitHub banner forbids production/commercial use. An API-first scheduler can take the SaaS-embed buyer this week.

1. Own “open-source Calendly alternative.” On 14 April 2026 Cal.com closed the production repo; Cal.diy has no teams, workflows, or SSO. They run cal.com/calcom-vs-calendly (100% Calendly-bill credit) and have no vs-SavvyCal page. Rank both phrases this week.

1. Meeting polls. Calendly ships polls on Free; SavvyCal includes unlimited polls on Basic ($10). Cal.com closed the Doodle-style request on 18 Nov 2025: “we still don't plan to implement this feature any time soon.” Ship polls; bid on “Calendly meeting poll.”

1. Lifetime + commerce for coaches. TidyCal Free sells packages, subscriptions, coupons, and digital products; Individual is $29 once. Cal.com’s payments page is Stripe/PayPal set-price event types. Remove-branding starts at Teams $12/user/month. A $29–$99 one-time or commerce-first SKU takes that buyer.

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Want one of these on your company? $79 teardown: https://whop.com/checkout/plan_KxyN5af4F4n2y · $29 homepage openings: https://whop.com/checkout/plan_b4Q5UrzKTobfE

Two one-shot briefs. You paste a URL. I send the page back on the clock, or you get a refund.

$29 · 24-hour homepage openings

Five specific gaps on your homepage (positioning, pricing, proof, SEO, or conversion). Not a redesign.

https://whop.com/checkout/plan_b4Q5UrzKTobfE

$79 · 48-hour competitor teardown

Who they are, three named competitors with the actual overlap, five openings a rival could use this week. Not a deck. Not a call.

https://whop.com/checkout/plan_KxyN5af4F4n2y

A public sample (Cal.com) is going up next so you can see the work before you pay.