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Hookdeck vs MailSlurp
Short answer: Pick Hookdeck if you want scalable webhook routing and observability; pick MailSlurp if you want programmable email & SMS testing. Hookdeck has a free plan, paid from $39/month; MailSlurp has a free plan.
HookdeckA reliable event gateway for event-driven applications
MailSlurpTest, build, and automate email and SMSWhich to pick
Pick Hookdeck if you want…
- Scalable webhook routing and observability
- Event gateway for webhook handling
- Integrations with Slack, Discord or Microsoft Teams (on Hookdeck's list, not MailSlurp's)
Pick MailSlurp if you want…
- Programmable email & SMS testing
- Integrations with Playwright, Cypress or Selenium (on MailSlurp's list, not Hookdeck's)
Side by side
- What it is
- Hookdeck:Hookdeck provides a reliable event gateway to receive, process, and deliver webhooks with routing, filtering, transformation, and rate-limiting.
- MailSlurp:MailSlurp provides programmable email addresses and phone numbers with APIs, SDKs and dashboards for testing and automating email and SMS workflows.
- Best for
- Hookdeck:Scalable webhook routing and observability
- MailSlurp:Programmable email & SMS testing
- Who it’s for
- Hookdeck:Developers and teams building event-driven applications that rely on webhooks.
- MailSlurp:Developers and QA engineers building, testing or automating email and SMS flows.
- Pricing
- Hookdeck:Freemium
- MailSlurp:Freemium
- Starting price
- Hookdeck:$39/month (Team)
- MailSlurp:—
- Free plan or trial
- Hookdeck:Free plan (Developer) · Free trial
- MailSlurp:Free plan (Free) · Free trial
- Plans
- Hookdeck:Developer $0 /month · Team $39 /month · Growth $499 /month
- MailSlurp:Free Free · Starter Free
- Works with
- Hookdeck:Slack, Discord, Microsoft Teams, PagerDuty, Opsgenie, Better Stack, Uptime, incident.io
- MailSlurp:Playwright, Cypress, Selenium, k6, JMeter, HubSpot, Braze, Brevo
Hookdeck features
- Receive & Debug Webhooks. Capture inbound webhooks locally or in the cloud with full observability.
- Filter, Transform & Route. Apply custom filters, transformations and routing rules before delivery.
- Queue with Rate Control. Manage delivery spikes with back-pressure handling and rate-limiting.
- Auto-detect Issues & Replay. Detect failing events, get alerts and replay missed deliveries.
- Outpost Delivery Platform. Add managed webhook delivery to your API or SaaS with tenant and subscription management.
- Metrics & Alerts. Monitor latency, throughput and error rates; receive alerts for third-party latency.
- Secure & Compliant. SOC2 compliance and optional HIPAA, SSO, SCIM for higher plans.
- CLI & Console Tools. Command-line interface for local testing and a web console for payload inspection.
MailSlurp features
- Programmable inboxes. Create unlimited temporary or permanent email inboxes, use custom domains or connect Gmail/Outlook via API, SMTP, IMAP and webhooks.
- Programmable phone numbers. Provision real mobile numbers for SMS, OTP and MFA, receive texts and route them into applications.
- Device rendering & inbox placement. Preview emails on real clients and devices, audit links and images, and test inbox or spam placement.
- AI data extraction. Convert emails, PDFs and attachments into structured JSON using prompts, schemas and OCR.
- Shared dashboards & enterprise access. Manage inboxes, numbers and results with roles, SSO, SCIM, audit logs and team permissions.
- Load & scale testing. Use inbox pools with k6, JMeter or Locust to verify message delivery under load.
- Webhooks & automation. Trigger webhooks, forwarding, automatic replies and integrate with Zapier, MCP and other automation tools.
- SDKs & REST API. Official SDKs for JavaScript, TypeScript, Python, Java, C#, PHP and direct REST API access.
Hookdeck vs MailSlurp FAQ
What is the difference between Hookdeck and MailSlurp?+
Hookdeck focuses on event routing, while MailSlurp provides full email/SMS inbox and testing capabilities.
Should I use Hookdeck or MailSlurp?+
Pick Hookdeck if you want scalable webhook routing and observability, event gateway for webhook handling or integrations with Slack, Discord or Microsoft Teams (on Hookdeck's list, not MailSlurp's). Pick MailSlurp if you want programmable email & SMS testing or integrations with Playwright, Cypress or Selenium (on MailSlurp's list, not Hookdeck's).
Is Hookdeck or MailSlurp free?+
Hookdeck has a free plan (Developer); paid plans start at $39/month (Team). MailSlurp has a free plan and paid plans.
Do Hookdeck and MailSlurp integrate with the same tools?+
Their integration lists don't overlap: Hookdeck lists Slack, Discord, Microsoft Teams, PagerDuty and 7 more; MailSlurp lists Playwright, Cypress, Selenium, k6 and 10 more.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.