Head-to-Head Specification Audit
Resend vs Sphera
SaaS Developers · Global
Specification Matrix
| Metric | Resend | Sphera |
|---|---|---|
| Starting Price | $20/mo | Custom pricing |
| API Rate Limit | Not confirmed | 60 req/min |
| Target Country | Global | Global |
| Category | Email API | Carbon & EHS Compliance |
| Compliance (vendor-stated) | GDPR, SOC2 | EU ETS, ISO 14064, GHG Protocol, REACH, CSRD, TCFD |
| Hosting Regions | US-East, EU-West | US-East, EU-West, AP-Singapore |
| Native Integrations | 6 listedBetter | 5 listed |
Resend — Key Specs
Vendor-stated- ✓React Email lets you build transactional email templates with JSX — version-controlled
- ✓Developer-first API: send an email in 5 lines of code with full TypeScript support
- ✓Free tier includes 3,000 emails/month and 1 custom domain — zero credit card
- ✓Delivery logs and webhooks per-email event (sent, delivered, bounced, opened)
Sphera — Key Specs
Vendor-stated- ✓EHS + carbon + product sustainability in one enterprise platform
- ✓EU ETS allowance tracking and surrender automation
- ✓ISO 14064 verified carbon footprint methodology built-in
- ✓Chemical and process safety module for REACH and HAZMAT
- ✓Trusted by BASF, Dow, ExxonMobil, Siemens
Frequently Asked Questions
Which is lower-priced, Resend or Sphera?+
Sphera uses custom pricing. Resend starts at $20/mo. Contact Sphera directly for a quote.
Which compliance frameworks do Resend and Sphera list?+
Resend additionally lists GDPR, SOC2. Sphera additionally lists EU ETS, ISO 14064, GHG Protocol, REACH, CSRD, TCFD. These are vendor-stated frameworks. VektorIndex has not independently audited these claims.
Which has a higher documented API rate limit — Resend or Sphera?+
Available information does not support a direct comparison of API rate limits for these tools. Check each vendor's developer documentation.
Which data hosting regions do Resend and Sphera support?+
Resend lists hosting regions: US-East, EU-West. Sphera lists hosting regions: US-East, EU-West, AP-Singapore. For data residency requirements in Global, confirm exact region configuration directly with each vendor.
Data last updated: 29 August 2026 — Sourced from official vendor documentation. Not independently audited. Report incorrect information
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