What is LithoBlocks used for?

LithoBlocks is a visual builder for Slack message templates that versions them and lets code send them with one REST API call carrying only data. It is a good fit for engineering teams sending alerts to Slack channels and non-engineers editing notification copy.

How much does LithoBlocks cost?

Paid plans for LithoBlocks start at $25 per month, and there is no free plan. A free trial is available.

Is LithoBlocks open source?

No. LithoBlocks is proprietary (closed-source) software and can't be self-hosted. In the API Tools category, open-source options include Scalar, Mockoon and Requestly.

What are some alternatives to LithoBlocks?

LithoBlocks competes with Courier and Knock.

LithoBlocks: features, pricing and alternatives

About LithoBlocks

LithoBlocks removes Block Kit JSON from application code. Instead of hand-coding a Slack message with dozens of lines of blocks, you design the message on a visual canvas, type real content and see the rendered message instantly. The template lives in LithoBlocks, and your code makes one POST request to a send endpoint with a template ID, a channel ID and the data to fill in.

Templates are versioned and owned by the team, so operations, support and marketing staff can edit copy without an engineer changing the repository. The builder can still export valid Block Kit JSON, and modals with inputs and selects can be built for interactive forms. API responses report the message timestamp, remaining credits, warnings and whether Slack truncated any fields.

LithoBlocks is a hosted service with a demo, integration guides, pricing and a blog. A 14-day free trial is available on any plan. The homepage contrasts a roughly 60-line Block Kit message written in code with a short request that sends a stored template, using an alert about a failed webhook as the example.

Key features

Visual Slack Block Kit builder
One REST call to send a template with data
Versioned, team-owned templates
Export of valid Block Kit JSON
Modals with inputs and selects
API responses with credits and truncation warnings

Good fit for

Engineering teams sending alerts to Slack channels
Non-engineers editing notification copy

Tags: slack; message-templates; block-kit; rest-api; notifications; developer-tools; versioning

LithoBlocks: questions and answers

What is LithoBlocks used for?: LithoBlocks is a visual builder for Slack message templates that versions them and lets code send them with one REST API call carrying only data. It is a good fit for engineering teams sending alerts to Slack channels and non-engineers editing notification copy.
How much does LithoBlocks cost?: Paid plans for LithoBlocks start at $25 per month, and there is no free plan. A free trial is available.
Is LithoBlocks open source?: No. LithoBlocks is proprietary (closed-source) software and can't be self-hosted. In the API Tools category, open-source options include Scalar, Mockoon and Requestly.
What are some alternatives to LithoBlocks?: LithoBlocks competes with Courier and Knock.