Compare
Resend vs spFlat!
Provides email sending API but does not handle SPF flattening or monitoring.
spFlat!Prevent PermError and bypass the SPF 10-lookup limit automatically.Which to pick
Pick Resend if you want…
- Simple email API with built-in analytics
- Email API for developers
- A free plan to start with
Pick spFlat! if you want…
- Automated SPF flattening and 24/7 IP monitoring
Side by side
- What it is
- Resend:Resend provides a developer-focused email API for sending transactional and marketing emails at scale.
- spFlat!:spFlat! automatically flattens SPF records, monitors IP changes and keeps DNS records updated to stay under the 10-lookup limit.
- Best for
- Resend:Simple email API with built-in analytics
- spFlat!:Automated SPF flattening and 24/7 IP monitoring
- Who it’s for
- Resend:Developers building apps that need reliable email sending.
- spFlat!:DevOps, email administrators and security teams managing SPF records.
- Pricing
- Resend:Freemium
- spFlat!:Paid
- Plans
- Resend:Free $0 · Pro $20 per month · Scale $90 per month
- spFlat!:—
- Works with
- Resend:Node.js, Ruby, Python, PHP, Go, Rust, Java, .NET
- spFlat!:—
Resend features
- SDKs & REST API. Official SDKs for Node, Ruby, Python, PHP, Go, Rust, Java, .NET and a REST endpoint.
- Test mode. Simulate email events without sending real messages.
- Modular webhooks. Real-time notifications for deliveries, opens, clicks, bounces, etc.
- React Email editor. Create email templates with React components instead of hand-crafted HTML tables.
- Contact management. Import lists, view attributes and segment contacts via the dashboard.
- Analytics & reporting. Track opens, clicks, bounces and view broadcast performance.
- Domain authentication. DKIM, SPF and DMARC setup plus BIMI support for brand logos.
- Dedicated IPs (add-on). Managed IP warming and autoscaling for high-volume senders.
spFlat! features
- Free SPF lookup & audit. Check how many DNS lookups your SPF chain uses and if it exceeds the 10-lookup limit.
- Automatic SPF flattening. Resolves includes and replaces them with IP addresses, reducing lookups to one.
- 24/7 IP range monitoring. Continuously watches email provider IP changes and updates the flattened SPF record.
- One-click DNS update. Provides a ready-to-paste SPF record for you to copy into your DNS.
- ISO 27001 & NEN 7510 certified. Hosted by a security-certified provider ensuring GDPR compliance.
- 99.9% uptime SLA. Guarantees high availability for the monitoring service.
Resend vs spFlat! FAQ
Is Resend or spFlat! free?+
Resend has a free plan; paid plans start at $20/month (Pro). spFlat! is paid, with a free trial.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.