SMTP2GO vs Plunk
A detailed comparison to help you choose between SMTP2GO and Plunk.
Quick Verdict
3.9/5
SMTP2GO
0 reviews
3.7/5
Plunk
0 reviews
SMTP2GO is rated higher (3.9 vs 3.7). SMTP2GO is an SMTP relay service with a 99.99% uptime guarantee. 1,000 free emails/month, detailed reporting, bounce management, and Australian-founded reliability focus. Open-source (AGPL-3.0) email platform for transactional emails, newsletters and automations. Free for 1,000 emails/month, then $0.001 per email; self-hostable via Docker. EU-hosted, SMTP + REST API, unlimited contacts.
SMTP2GO SMTP relay with a 100% delivery SLA (deliver or refund), free tier from 1,000 emails/month | Plunk Transactional email infrastructure built for developers | |
|---|---|---|
| Overview | ||
| Rating | 3.9 (0 reviews)✓ | 3.7 (0 reviews) |
| Pricing model | freemium | freemium: free 1,000 emails/month, then $0.001 per email pay-as-you-go |
| Starting price | Free tier available | Free tier available |
| Best for | Small businesses and developers needing reliable transactional SMTP relay with strong reporting, a real free tier, and a delivery guarantee behind it | Indie hackers and SaaS teams wanting one affordable, self-hostable system for transactional email, newsletters and triggered flows — especially EU-based ones |
| Features | ||
| IPv6 | ||
| DDoS protection | ||
| Automated backups | ||
| Snapshots | ||
| Managed option | ||
| Bare metal | ||
| GPU available | ||
| S3-compatible | ||
| Hourly billing | ||
| Free tier | ||
| Tags | ||
| Tags | free tierapi access | free tieropen sourceself hostableapi access |
| Visit SMTP2GO → | Visit Plunk → | |
SMTP2GO
Pros
- + Permanent free plan: 1,000 emails/month with no time limit
- + 100% delivery SLA in the terms (deliver or refund) plus 30-day money-back guarantee
- + Multi-region routing with best-path selection across ~10 locations in US/EU/APAC
- + Deliverability tooling included on all plans: DKIM/SPF automation, feedback loops, blacklist and spamtrap monitoring
- + Clear real-time reporting and bounce/spam tracking; 20-year operating history, bootstrapped
Cons
- - Dedicated IP requires the $75 Professional tier — a steep jump from Starter
- - Professional overage bills above the in-plan per-message rate
- - Free plan limits: 200/day, 25/hour until domain verification, 5 days reporting, ticket support only after 14 days
- - Reporting retention short by default (30 days); longer storage is a paid add-on
- - Scale ceiling versus the large API platforms at tens of millions of emails per month
Plunk
Pros
- + Dead-simple pricing: free at 1,000 emails/month, then $0.001/email with no base fee and per-category spend caps
- + AGPL-3.0 open source with free self-hosting via Docker — full data ownership and an exit path
- + Transactional, campaigns, workflows and inbound email in one product with unlimited contacts on every plan
- + EU-hosted and GDPR-focused, with DKIM/SPF/DMARC configured automatically on custom domains
- + SMTP relay plus a language-agnostic REST API; email validation and real-time analytics built in
Cons
- - No published uptime SLA or deliverability guarantees; sending IP reputation unproven at scale
- - Small team and young product (2022) versus incumbents with a decade of sending history
- - Hosted platform is EU-only; no dedicated IP or managed IP warm-up offering (the DB's IP warming claim is wrong)
- - AGPL-3.0 copyleft matters if you embed the software in a commercial product
Stay in the loop
Get weekly updates on the best new hosting and infrastructure providers, deals, and comparisons.
No spam. Unsubscribe anytime.