StackBest email (transactional & marketing) for solo founders
Your app needs two kinds of email: transactional (password resets, receipts, magic links) and marketing (newsletters, launch announcements, drip sequences). Most tools do one well and the other badly, so many solo founders end up paying for two services without realizing the overlap. The real costs hide in overage rates, contact-count billing, and free tiers that quietly expired or cap you at 100 sends a day.
| Tool | Free tier | Paid from | Best for |
|---|---|---|---|
 Resend$20/mo | $20/mo | Solo devs shipping a SaaS who want transactional email working today with zero email expertise | |
| $15/mo | Founders whose password resets and receipts absolutely must land in the inbox | ||
 Loops$49/mo | $49/mo | SaaS founders who want all product email in one tool and can absorb $49/mo | |
 SendGrid$19.95/mo | $19.95/mo | Founders already on Twilio or expecting 100K+ emails/mo soon | |
 Mailgun$15/mo | $15/mo | Backend-heavy founders who want raw SMTP/API sending and inbound routing cheap | |
 Kit (ConvertKit)$33/mo | $33/mo | Creator-founders monetizing an audience with sequences and digital products | |
 Buttondown$9/mo | $9/mo | Developer-founders running a simple newsletter next to their product for under $10/mo | |
 Beehiiv$43/mo | $43/mo | Founders making the newsletter itself a growth channel or revenue product |
Start with Resend free (3,000 transactional emails/mo) for app email and Beehiiv Launch or Buttondown for the newsletter, total $0 to $9/mo. When you pass 3,000 transactional sends, Resend Pro at $20/mo is the obvious upgrade; if deliverability of receipts and resets becomes business-critical, Postmark at $15/mo is the safer engine.
Consolidate onto Loops ($49/mo) only once you are juggling drip sequences plus transactional in two tools and the time cost exceeds the price gap. Skip SendGrid unless you expect 100K+ emails a month: its free tier is now a 60-day trial and support is thin at the low end.
Ask about these tools
[ Partnerships ] Building a tool solo founders should know about?
DM @monjodavKnow what your whole stack costs
StackTracker adds up every one of these, plus your hours.
Start tracking · $9/mo