Email APIs · side by side
Knock vs Mailjet
Compare Knock, Mailjet by sending volume, delivery webhooks, inbound email, domain limits and retention.
Email APIs pricing calculator
These providers bill in different units. Each estimate uses its own workload; there is no same-volume price winner.
Knock
0
Mailjet
0
Knock
$0 / mo
Developer · 0 messages
Mailjet
$0 / mo
Free · 0 emails
Listed USD plan fees and tracked usage only. Unlisted compute, transfer, extras, taxes and contract terms are excluded. Custom or unsupported plan usage is not estimated.
Email APIs overview & pricing
| Email APIs | Knock | Mailjet |
|---|---|---|
| Provider | Knock Labs, Inc. | Sinch |
| Billing unit | messages | emails |
| Plan at selected usage | Developer | Free |
| Monthly estimate | $0/mo | $0/mo |
| Workload | 0 messages | 0 emails |
| Free access | Developer plan includes up to 10,000 messages per month, 500 guide active users, and 500 AI agent credits. | Free plan includes 6,000 emails per month capped at 200 emails per day, with up to 1,000 contacts, API/SMTP relay access |
| Published plans | Developer, Starter, Enterprise | Free, Starter, Essential, Premium, Custom |
| Prices checked | 2026-10-08 | 2026-10-08 |
Provider
- Knock
- Knock Labs, Inc.
- Mailjet
- Sinch
Billing unit
- Knock
- messages
- Mailjet
- emails
Plan at selected usage
- Knock
- Developer
- Mailjet
- Free
Monthly estimate
- Knock
- $0/mo
- Mailjet
- $0/mo
Workload
- Knock
- 0 messages
- Mailjet
- 0 emails
Free access
- Knock
- Developer plan includes up to 10,000 messages per month, 500 guide active users, and 500 AI agent credits.
- Mailjet
- Free plan includes 6,000 emails per month capped at 200 emails per day, with up to 1,000 contacts, API/SMTP relay access
Published plans
- Knock
- Developer, Starter, Enterprise
- Mailjet
- Free, Starter, Essential, Premium, Custom
Prices checked
- Knock
- 2026-10-08
- Mailjet
- 2026-10-08
Email APIs monthly cost
Knock: $0Mailjet: $0
Different workloads, separate estimates
Separate transactional delivery from campaigns, outreach and agent inboxes. Compare monthly sends and daily caps; contacts, seats and inboxes are not sending allowances. Budget separately for dedicated IPs, validation and attachments.
Email APIs feature comparison
| Email APIs | Knock | Mailjet |
|---|---|---|
| Dedicated IP | Not listed | |
| Messages included | Up to 10,000 Upgrade for additional usage. | Not listed |
| Guide active users included | Up to 500 Upgrade for additional usage. | Not listed |
| AI agent credits included | 500 $.01 per additional credit. | Not listed |
| Notification channels | Unlimited | Not listed |
| Team members | Unlimited | Not listed |
| Recipients | Unlimited | Not listed |
| Power Knock with source events | Not listed | |
| Notification workflows | Unlimited | Not listed |
| Workflow triggers | Unlimited | Not listed |
| Intelligent cross-channel routing | Not listed | |
| Batching | Not listed | |
| Fetch from HTTP | Not listed | |
| Conditional sending | Not listed | |
| Scheduled workflows | Not listed | |
| Preferences | Not listed | |
| End-to-end testing | Not listed | |
| Email client previews | Not listed | |
| Non-user recipients | Not listed | |
| Manage via API & CLI | Not listed | |
| Translations (i18n) | Not listed | |
| Feeds per recipient | Unlimited | Not listed |
| Pre-built components (In-app feeds) | Not listed | |
| Bring your own components (In-app feeds) | Not listed | |
| Remove Knock branding | Not listed | |
| Feed retention | Unlimited | Not listed |
| Feed API | Not listed | |
| Custom feed filtering | Not listed | |
| Unlimited guides | Unlimited | Not listed |
| Guide ordering | Not listed | |
| Guide throttling | Not listed | |
| Pre-built components (In-app guides) | Not listed | |
| Bring your own components (In-app guides) | Not listed | |
| Per-tenant branding | Not listed | |
| Per-tenant preferences | Not listed | |
| Logs | Not listed | |
| Log retention | 30-day retention | Not listed |
| Engagement tracking | Not listed | |
| Stream observability data | Not listed | |
| Stream analytics to Segment | Not listed | |
| Stream analytics to data warehouse | Not listed | |
| Version control & history | Not listed | |
| Isolated environments | Unlimited | Not listed |
| Custom roles and permissions | Not listed | |
| Audit logs | Not listed | |
| Google SSO | Not listed | |
| Custom SSO | Not listed | |
| Directory sync (SCIM) | Not listed | |
| Template migration services | Not listed | |
| Uptime SLA | 99.9% | Not listed |
| Enterprise support | Not listed | |
| Dedicated infrastructure | Not listed | |
| Advanced Email Editor | Not listed | |
| Email Templates | Not listed | |
| Unlimited Contacts | Not listed | |
| GDPR-Compliant Subscription Forms | Not listed | |
| Integrations | Not listed | |
| MJML | Not listed | |
| No Mailjet Logo | Not listed | |
| Saved, Locked and Linked Sections | Not listed | |
| Landing Pages | Not listed | |
| AI Assisted content creation | Not listed | |
| Personalization | Not listed | |
| Templating Language | Not listed | |
| Segmentation | Not listed | |
| Brand Kit | Not listed | |
| Dynamic Content | Not listed | |
| Automations | Not listed | |
| Custom Unsubscribe Page | Not listed | |
| Preference Center | Not listed | |
| Email Tracking Consent | Not listed | |
| Anonymous Tracking | Not listed | |
| Basic Statistics | Not listed | |
| Webhooks (event API) | Not listed | |
| Advanced Statistics | Not listed | |
| Validations | Not listed | |
| Campaign Comparison | Not listed | |
| A/B Testing | Not listed | |
| Email Previews | Not listed | |
| Monthly Deliverability Reports and Recommendations | Not listed | |
| Send API | Not listed | |
| SMTP Relay | Not listed | |
| Multi-user Access | Not listed | |
| Multi-user Collaboration | Not listed | |
| Advanced permissions | Not listed | |
| Predefined roles | Not listed | |
| Activity Logs | Not listed | |
| Subaccounts | Not listed | |
| Online Customer Support | Not listed | First Month Only |
| Priority Support | Not listed | |
| Phone and Chat Support | Not listed | |
| Dedicated Technical Account Manager | Not listed | |
| Deliverability Services | Not listed | |
| Comprehensive onboarding | Not listed | |
| API Expert | Not listed | |
| Custom deliverability strategy | Not listed | |
| Reputation monitoring | Not listed | |
| Service Level Agreement | Not listed | |
| Deliverability and platform training for your team | Not listed |
Dedicated IP
- Knock
- Not listed
- Mailjet
Messages included
- Knock
- Up to 10,000 Upgrade for additional usage.
- Mailjet
- Not listed
Guide active users included
- Knock
- Up to 500 Upgrade for additional usage.
- Mailjet
- Not listed
AI agent credits included
- Knock
- 500 $.01 per additional credit.
- Mailjet
- Not listed
Notification channels
- Knock
- Unlimited
- Mailjet
- Not listed
Team members
- Knock
- Unlimited
- Mailjet
- Not listed
Recipients
- Knock
- Unlimited
- Mailjet
- Not listed
Power Knock with source events
- Knock
- Mailjet
- Not listed
Notification workflows
- Knock
- Unlimited
- Mailjet
- Not listed
Workflow triggers
- Knock
- Unlimited
- Mailjet
- Not listed
Intelligent cross-channel routing
- Knock
- Mailjet
- Not listed
Batching
- Knock
- Mailjet
- Not listed
Fetch from HTTP
- Knock
- Mailjet
- Not listed
Conditional sending
- Knock
- Mailjet
- Not listed
Scheduled workflows
- Knock
- Mailjet
- Not listed
Preferences
- Knock
- Mailjet
- Not listed
End-to-end testing
- Knock
- Mailjet
- Not listed
Email client previews
- Knock
- Mailjet
- Not listed
Non-user recipients
- Knock
- Mailjet
- Not listed
Manage via API & CLI
- Knock
- Mailjet
- Not listed
Translations (i18n)
- Knock
- Mailjet
- Not listed
Feeds per recipient
- Knock
- Unlimited
- Mailjet
- Not listed
Pre-built components (In-app feeds)
- Knock
- Mailjet
- Not listed
Bring your own components (In-app feeds)
- Knock
- Mailjet
- Not listed
Remove Knock branding
- Knock
- Mailjet
- Not listed
Feed retention
- Knock
- Unlimited
- Mailjet
- Not listed
Feed API
- Knock
- Mailjet
- Not listed
Custom feed filtering
- Knock
- Mailjet
- Not listed
Unlimited guides
- Knock
- Unlimited
- Mailjet
- Not listed
Guide ordering
- Knock
- Mailjet
- Not listed
Guide throttling
- Knock
- Mailjet
- Not listed
Pre-built components (In-app guides)
- Knock
- Mailjet
- Not listed
Bring your own components (In-app guides)
- Knock
- Mailjet
- Not listed
Per-tenant branding
- Knock
- Mailjet
- Not listed
Per-tenant preferences
- Knock
- Mailjet
- Not listed
Logs
- Knock
- Mailjet
- Not listed
Log retention
- Knock
- 30-day retention
- Mailjet
- Not listed
Engagement tracking
- Knock
- Mailjet
- Not listed
Stream observability data
- Knock
- Mailjet
- Not listed
Stream analytics to Segment
- Knock
- Mailjet
- Not listed
Stream analytics to data warehouse
- Knock
- Mailjet
- Not listed
Version control & history
- Knock
- Mailjet
- Not listed
Isolated environments
- Knock
- Unlimited
- Mailjet
- Not listed
Custom roles and permissions
- Knock
- Mailjet
- Not listed
Audit logs
- Knock
- Mailjet
- Not listed
Google SSO
- Knock
- Mailjet
- Not listed
Custom SSO
- Knock
- Mailjet
- Not listed
Directory sync (SCIM)
- Knock
- Mailjet
- Not listed
Template migration services
- Knock
- Mailjet
- Not listed
Uptime SLA
- Knock
- 99.9%
- Mailjet
- Not listed
Enterprise support
- Knock
- Mailjet
- Not listed
Dedicated infrastructure
- Knock
- Mailjet
- Not listed
Advanced Email Editor
- Knock
- Not listed
- Mailjet
Email Templates
- Knock
- Not listed
- Mailjet
Unlimited Contacts
- Knock
- Not listed
- Mailjet
GDPR-Compliant Subscription Forms
- Knock
- Not listed
- Mailjet
Integrations
- Knock
- Not listed
- Mailjet
MJML
- Knock
- Not listed
- Mailjet
No Mailjet Logo
- Knock
- Not listed
- Mailjet
Saved, Locked and Linked Sections
- Knock
- Not listed
- Mailjet
Landing Pages
- Knock
- Not listed
- Mailjet
AI Assisted content creation
- Knock
- Not listed
- Mailjet
Personalization
- Knock
- Not listed
- Mailjet
Templating Language
- Knock
- Not listed
- Mailjet
Segmentation
- Knock
- Not listed
- Mailjet
Brand Kit
- Knock
- Not listed
- Mailjet
Dynamic Content
- Knock
- Not listed
- Mailjet
Automations
- Knock
- Not listed
- Mailjet
Custom Unsubscribe Page
- Knock
- Not listed
- Mailjet
Preference Center
- Knock
- Not listed
- Mailjet
Email Tracking Consent
- Knock
- Not listed
- Mailjet
Anonymous Tracking
- Knock
- Not listed
- Mailjet
Basic Statistics
- Knock
- Not listed
- Mailjet
Webhooks (event API)
- Knock
- Not listed
- Mailjet
Advanced Statistics
- Knock
- Not listed
- Mailjet
Validations
- Knock
- Not listed
- Mailjet
Campaign Comparison
- Knock
- Not listed
- Mailjet
A/B Testing
- Knock
- Not listed
- Mailjet
Email Previews
- Knock
- Not listed
- Mailjet
Monthly Deliverability Reports and Recommendations
- Knock
- Not listed
- Mailjet
Send API
- Knock
- Not listed
- Mailjet
SMTP Relay
- Knock
- Not listed
- Mailjet
Multi-user Access
- Knock
- Not listed
- Mailjet
Multi-user Collaboration
- Knock
- Not listed
- Mailjet
Advanced permissions
- Knock
- Not listed
- Mailjet
Predefined roles
- Knock
- Not listed
- Mailjet
Activity Logs
- Knock
- Not listed
- Mailjet
Subaccounts
- Knock
- Not listed
- Mailjet
Online Customer Support
- Knock
- Not listed
- Mailjet
- First Month Only
Priority Support
- Knock
- Not listed
- Mailjet
Phone and Chat Support
- Knock
- Not listed
- Mailjet
Dedicated Technical Account Manager
- Knock
- Not listed
- Mailjet
Deliverability Services
- Knock
- Not listed
- Mailjet
Comprehensive onboarding
- Knock
- Not listed
- Mailjet
API Expert
- Knock
- Not listed
- Mailjet
Custom deliverability strategy
- Knock
- Not listed
- Mailjet
Reputation monitoring
- Knock
- Not listed
- Mailjet
Service Level Agreement
- Knock
- Not listed
- Mailjet
Deliverability and platform training for your team
- Knock
- Not listed
- Mailjet
Showing 15 of 99
Which email providers fit your needs?
Knock features & plan notes
- Cross-channel workflow orchestration with batching, delays, and branch logic
- Prebuilt and headless UI components for in-app notification feeds
- Out-of-the-box user preference management and hosted preference centers
- Git-like commit and workflow promotion across environments with CLI and API support
- 10K messages (Includes messages sent from workflows and broadcasts)
- 500 guide active users (A user that sees at least one guide in the month)
- 500 AI agent credits (Credits consumed by AI agent function, then $.01 per credit)
- Unlimited notification workflows
- Unlimited broadcasts
- Unlimited delivery channels
- Unlimited team members
- Batch and delay notifications
- Built-in multi-tenancy
- SSO via Google
Mailjet features & plan notes
- Send transactional and marketing emails via Send API v3.1 or SMTP relay
- Real-time event webhooks for opens, clicks, bounces, spam complaints, and blocks
- Responsive email builder with support for MJML open-source markup
- Contact list management, email address validations, and inbox preview testing
- 1,000 contacts
- APIs, SMTP Relay, Webhooks
- Advanced Email Editor
- Basic Statistics
- Form Builder
- Email Tracking Consent
How to compare email providers
Separate transactional delivery from campaigns, outreach and agent inboxes. Compare monthly sends and daily caps; contacts, seats and inboxes are not sending allowances. Budget separately for dedicated IPs, validation and attachments.
Browse Email APIs pricingKnock vs Mailjet — FAQ
Knock: $0/month on Developer at 0 messages. Mailjet: $0/month on Free at 0 emails. Different billing units are not an equal-workload comparison. Estimates exclude unlisted add-ons and taxes.
Review SMTP or API integration, domain authentication, bounce and complaint events, suppression handling and delivery-log retention.
Only when the published plan actually bills by sends. Contacts, subscribers and inboxes stay in their own billing units.
Cross-channel workflow orchestration with batching, delays, and branch logic, Prebuilt and headless UI components for in-app notification feeds, Out-of-the-box user preference management and hosted preference centers, Git-like commit and workflow promotion across environments with CLI and API support. Free access: Developer plan includes up to 10,000 messages per month, 500 guide active users, and 500 AI agent credits.. Check plan-specific availability and current terms on the provider's official pricing page.
Send transactional and marketing emails via Send API v3.1 or SMTP relay, Real-time event webhooks for opens, clicks, bounces, spam complaints, and blocks, Responsive email builder with support for MJML open-source markup, Contact list management, email address validations, and inbox preview testing. Free access: Free plan includes 6,000 emails per month capped at 200 emails per day, with up to 1,000 contacts, API/SMTP relay access. Check plan-specific availability and current terms on the provider's official pricing page.