Hyvor Relay vs Nuntly
Hyvor Relay
relay.hyvor.com
Nuntly
nuntly.comSide by side
| Figure | Hyvor Relay | Nuntly |
|---|---|---|
| Price from | €30/mo | €10/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 3 | 5 |
| Spec score · Transactional Email Software | 8.7 (#6) | 8.8 (#5) |
| Spec score · Transactional email services | 8.5 (#14) | 8.8 (#6) |
| Email sending | Its idempotent REST API supports HTML and plain text, attachments, custom headers, and multiple recipients. | It supports single emails, bulk sending, scheduled delivery, SMTP, attachments, CC, BCC, Reply-to, and idempotency keys. |
| Free plan | Yes | Yes |
| Headquarters | Paris, France | Châtillon, France |
| Integrations | The self-hosting guide lists built-in Prometheus, Grafana, and Alertmanager integrations for monitoring and observability. | Nuntly integrates with AI agents through structured JSON, thread context, agent memory, and a Reply API. |
| Monthly send limit | 300000 | 10000 |
| Security | The hosting documentation says its HTTP server has built-in application-layer rate limiting and recommends cloud-provider DDoS protection for network-layer attacks. | Nuntly states that data is encrypted at rest with AES-256 and in transit with TLS 1.3, with API keys hashed or encrypted and rotatable without downtime. |
| Webhooks | Real-time event webhooks report deliveries, bounces, domain verifications, and other events. | Webhook deliveries support automatic retries, exponential backoff, filtering, replay, payload inspection, and cryptographic signature verification. |
Plans
Hyvor Relay
- Enterprise License€10,000 a year
- Cloud Standard€30 a month
- Self-Hosted Open-SourceFree
Nuntly
- FreeFree
- Starter€10 a month
- Scale€68 a month
- EnterprisePriced on request
- FreeFree
In their own words
Hyvor Relay
Hyvor Relay has no write-up on Specifiction yet; its figures are above.
Nuntly
Nuntly is a developer-focused email platform for sending and receiving transactional email, replying to messages, and tracking activity through one REST API. It supports single or bulk sends, scheduled or immediate delivery, and messages with or without templates. For inbound email, it provides custom inboxes, stored messages, thread grouping, attachment access, webhooks, and a Reply API. The REST API covers domains, API keys, webhooks, analytics, sending, receiving, and team members; documented SDKs include TypeScript and Java. Webhooks expose delivery, open, click, bounce, complaint, and inbound-message activity, with retries, replay, filtering, payload inspection, and signature verification. Logs are retained for up to 30 days. Nuntly says data is encrypted in transit and at rest, and hosted and processed in Europe by default. Its Free plan requires no card and costs nothing; it allows 3,000 emails monthly, 100 daily, one domain, and one inbox. Starter costs €10 a month and allows up to 10,000 emails monthly. Nuntly is headquartered in Châtillon, France.