How do Knock and SendGrid prices compare?

Knock: $0/month on Developer at 0 messages. SendGrid: $90/month on Pro at 100,000 emails. Different billing units are not an equal-workload comparison. Estimates exclude unlisted add-ons and taxes.

What matters for transactional email?

Review SMTP or API integration, domain authentication, bounce and complaint events, suppression handling and delivery-log retention.

Can I compare marketing and agent email by sends?

Only when the published plan actually bills by sends. Contacts, subscribers and inboxes stay in their own billing units.

What features and free access does Knock list?

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.

What features and free access does SendGrid list?

Marketing + transactional, Mature deliverability. Free access: 100 emails/day (trial). Check plan-specific availability and current terms on the provider's official pricing page.

Email APIs · side by side

Knock vs SendGrid

Compare Knock, SendGrid 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

Monthly messages

SendGrid

Monthly emails

100K

Knock

$0 / mo

Developer · 0 messages

SendGrid

$90 / mo

Pro · 100K 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	SendGrid
Provider	Knock Labs, Inc.	Twilio
Billing unit	messages	emails
Plan at selected usage	Developer	Pro
Monthly estimate	$0/mo	$90/mo
Workload	0 messages	100K emails
Free access	Developer plan includes up to 10,000 messages per month, 500 guide active users, and 500 AI agent credits.	100 emails/day (trial)
Published plans	Developer, Starter, Enterprise	Free Trial, Essentials, Pro, Premier
Prices checked	2026-10-08	2026-10-08

Provider

Knock: Knock Labs, Inc.
SendGrid: Twilio

Billing unit

Knock: messages
SendGrid: emails

Plan at selected usage

Knock: Developer
SendGrid: Pro

Monthly estimate

Knock: $0/mo
SendGrid: $90/mo

Workload

Knock: 0 messages
SendGrid: 100K emails

Free access

Knock: Developer plan includes up to 10,000 messages per month, 500 guide active users, and 500 AI agent credits.
SendGrid: 100 emails/day (trial)

Published plans

Knock: Developer, Starter, Enterprise
SendGrid: Free Trial, Essentials, Pro, Premier

Prices checked

Knock: 2026-10-08
SendGrid: 2026-10-08

Email APIs monthly cost

Knock: $0SendGrid: $90

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	SendGrid
Single sign-on	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
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
SMTP and API	Not listed
Comprehensive Client Libraries	Not listed
Setup Guide	Not listed
Interactive API Docs	Not listed
Knowledge Center	Not listed
Purpose-Built Mail Transfer Agent	Not listed
Domain Authentication (SPF/DKIM)	Not listed
Dedicated IP Addresses	Not listed	1 included*
Dedicated IP Pooling	Not listed
Automated, dedicated IP warm up	Not listed
Email Address Validation API	Not listed	2,500 free validations included
Reputation & Delivery Visibility	Not listed
Suppression Management	Not listed
Globally Distributed Architecture	Not listed
Link Branding	Not listed
Reverse DNS	Not listed
Universal Links	Not listed
IP Access Management	Not listed
Two-Factor Authentication	Not listed
TLS Encryption	Not listed
SOC 2 Type II Certification	Not listed
GDPR Compliance	Not listed
Data Residency (EU)	Not listed
Event Webhook Security	Not listed
Event Webhook	Not listed	5 included
Deliverability Insights	Not listed
Real-Time Analytics	Not listed
Advanced Statistics	Not listed
Inbound Parse Webhook	Not listed
Bounce and Block Classifications	Not listed
Engagement Tracking
ISP Feedback Loop Data	Not listed
Subuser Comparison Statistics	Not listed
Searchable Email Activity	Not listed	7 days of history
Additional Email Activity History	Not listed	Available for purchase
Sender Engagement Quality Score	Not listed
Email Logs	Not listed
Access to Expert Services	Not listed	Available for purchase
Access to Personalized Support	Not listed	Available for purchase
Expert Email Program Management	Not listed
Dynamic Templates	Not listed
Email Content Testing	Not listed	60 credits/mo (more for purchase)
Teammate Permissions	Not listed	1,000 teammates
API Key Permissions	Not listed
Subuser Management	Not listed

Single sign-on

Knock: Not listed
SendGrid

Messages included

Knock: Up to 10,000 Upgrade for additional usage.
SendGrid: Not listed

Guide active users included

Knock: Up to 500 Upgrade for additional usage.
SendGrid: Not listed

AI agent credits included

Knock: 500 $.01 per additional credit.
SendGrid: Not listed

Notification channels

Knock: Unlimited
SendGrid: Not listed

Team members

Knock: Unlimited
SendGrid: Not listed

Recipients

Knock: Unlimited
SendGrid: Not listed

Power Knock with source events

Knock
SendGrid: Not listed

Notification workflows

Knock: Unlimited
SendGrid: Not listed

Workflow triggers

Knock: Unlimited
SendGrid: Not listed

Intelligent cross-channel routing

Knock
SendGrid: Not listed

Batching

Knock
SendGrid: Not listed

Fetch from HTTP

Knock
SendGrid: Not listed

Conditional sending

Knock
SendGrid: Not listed

Scheduled workflows

Knock
SendGrid: Not listed

Showing 15 of 97

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

Full pricing Official Pricing API

SendGrid features & plan notes

Marketing + transactional
Mature deliverability
Analytics & deliverability optimization
Dedicated IPs included
Subuser management
Single sign-on (SSO)
Additional teammates: 1,000
Event webhook: 5
Email validation: 2,500
Dynamic templates: Editor and testing

Full pricing Official Pricing API

How to compare email providers

Browse Email APIs pricing

Knock vs SendGrid — FAQ

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