Knock

Notification infrastructure for developers

Knock vs Terraform / HCP Terraform: Full Comparison (2026)

Pricing, features, scores, and a clear verdict on which one is right for you.

The bottom line

Knock positions itself as "notification infrastructure for developers" while Terraform / HCP Terraform goes after "infrastructure as code with hcl" — so the right pick depends on which problem you're actually solving. Both use freemium pricing, but Knock charges per message while Terraform / HCP Terraform charges per resource — a meaningful difference for larger teams. Terraform / HCP Terraform (founded 2012) has had more time to build out its ecosystem and integrations, while Knock (2021) tends to move faster on modern UX and newer workflows.

At a glance

	Knock	Terraform / HCP Terraform
Our score	84/100	84/100
Starting price	Free	Free
Free tier	Yes	Yes
Best for	Notification infrastructure for developers	Infrastructure as code with HCL

Pricing comparison

Knock

Free tier available

FreeFree

Starter$100/mo

Pro$500/mo

Pricing verified 2026-04-16

Terraform / HCP Terraform

Free tier available

Open Source (CLI)Free

HCP Terraform FreeFree

HCP Terraform Plus$null/mo

Pricing verified 2026-04-16

Calculate your cost

How many developers?10

1500

KnockUnknown

Contact sales

Terraform / HCP TerraformUnknown

Contact sales

Try Knock free →Try Terraform / HCP Terraform free →

Feature comparison

core

Feature	Knock	Terraform / HCP Terraform
Multi-channel notifications	Yes	No
Workflow builder	Yes	No
User preferences	Yes	No
In-app feed	Yes	No
Template management	Yes	No
HCL configuration	No	Yes
State management	No	Yes
Plan/apply workflow	No	Yes
Modules	No	Yes
Provider ecosystem	No	Yes

advanced

Feature	Knock	Terraform / HCP Terraform
Branching logic	Yes	No
Digest notifications	Yes	No
Batch & debounce	Yes	No
Tenant support	Yes	No
Audit logs	Yes	No
Remote execution	No	HCP+
Policy as code (Sentinel)	No	HCP Plus+
Drift detection	No	HCP Plus+
Cost estimation	No	HCP Plus+
Self-hosted agents	No	HCP Plus+

integrations

Feature	Knock	Terraform / HCP Terraform
Sendgrid	Yes	No
Twilio	Yes	No
Slack	Yes	No
Push (Firebase/APNs)	Yes	No
Webhooks	Yes	No
AWS	No	Yes
GCP	No	Yes
Azure	No	Yes
Kubernetes	No	Yes
GitHub	No	Yes
GitLab	No	Yes

Ratings breakdown

Knock

Ease of use

9/10

Value for money

8/10

Features

9/10

Support

9/10

Terraform / HCP Terraform

Ease of use

6/10

Value for money

8/10

Features

9/10

Support

7/10

What the data tells us

Key capabilities you'd miss

Choosing Knock means going without HCL configuration, State management, Plan/apply workflow (which Terraform / HCP Terraform offers). Choosing Terraform / HCP Terraform means losing Multi-channel notifications, Workflow builder, User preferences. These are the features that typically drive the final decision — check whether your workflow depends on any of them before committing.

What company size tells you

Knock (1-10 employees) has the engineering bench to ship features across many fronts but may iterate slower on individual requests. Terraform / HCP Terraform (1,000+ employees) typically ships faster on its core product but may lag on peripheral features. Consider which matters more for your roadmap.

Choose Knock if...

You want a free tier to get started
You value an intuitive, easy-to-use interface
Getting strong value for money is a priority

Try Knock free →

Choose Terraform / HCP Terraform if...

You want a free tier to get started
You value powerful features over simplicity
Getting strong value for money is a priority

Try Terraform / HCP Terraform free →

Frequently asked questions

Is Knock or Terraform / HCP Terraform better?

Knock scores 84/100 compared to Terraform / HCP Terraform's 84/100 on VendorVS. However, the best choice depends on your needs — Knock excels at ease of use (9/10) while Terraform / HCP Terraform scores 6/10.

How much does Knock cost compared to Terraform / HCP Terraform?

Knock starts at free (free tier available). Terraform / HCP Terraform starts at free (free tier available). Knock is the more affordable option.

Does Knock or Terraform / HCP Terraform have a free plan?

Yes, both Knock and Terraform / HCP Terraform offer free tiers, so you can try each before committing to a paid plan.

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