Relpin vs Sendzai
Relpin and Sendzai are both live SaaS launches on ScrollLaunch. Here's how they compare - what each one does, who it's for, pricing, platforms, and how the community voted. Both listings are maker-submitted; ScrollLaunch doesn't endorse either side.
12 upvotes
Agentic WhatsApp automation & developer-first MCP tools for high-growth teams.
View SendzaiAt a glance
| Relpin | Sendzai | |
|---|---|---|
| Tagline | Ship internal tools with production governance | Agentic WhatsApp automation & developer-first MCP tools for high-growth teams. |
| Pricing | Freemium | Freemium |
| Starting price | Free plan · paid from €29/mo | $19/mo |
| Platforms | web | web, ios, android |
| Categories | DevTool, SaaS, Productivity | SaaS, AI, Marketing |
| Upvotes | 12 | 12 |
| Reviews | - | - |
| Launched | July 2026 | July 2026 |
| Maker | Yan Malinovskiy | Auto Send |
What is Relpin?
Relpin is a platform for internal tools. Apps are real TypeScript/React or Python code. You edit them in the browser, next to a code editor, an AI assistant, live preview, a terminal, Python workflows on a canvas, and a Postgres database scoped to your organisation.
Releases are content-addressed. Every publish is canonicalized, SHA-256 hashed and pinned to exact schema versions, so the build you tested is the build that ships.
Promotion runs DEV to TEST to PROD behind approval gates. TEST needs one approval. PROD needs two, and whoever requested the release cannot approve it. Promotion fails closed if the schema has drifted since the plan.
Each organisation gets its own Postgres database with row-level audit, not a shared one. Mutations, releases and deployments are recorded with the actor and the before/after values.
Most app builders stop once the UI is generated. The part they skip is production data access with no environment separation, no approvals and no audit trail. That is the part Relpin covers.
Open beta. Free plan, paid from EUR 29 per month. Runs in the browser, nothing to install.
Best for: Engineering, ops and platform teams that build internal tools against production data. Most useful where audits, compliance or access control already matter.
See the full listing - Relpin on ScrollLaunch.
What is Sendzai?
Sendzai is the world's most advanced WhatsApp automation hub, designed to bridge high-volume campaign orchestration with developer/AI-agent workflows. Whether you are a marketing team launching sequential media campaigns or a developer looking to trigger WhatsApp messages from AI agents, Sendzai provides the complete command center.
For businesses and marketing teams, Sendzai offers a visual dashboard to compose sequential messaging flows. Its "Ghost Engine" protects your phone numbers using randomized human delays, recipient timezone-aware scheduling, and account sharding (automatically distributing campaign loads across up to 50 active WhatsApp accounts).
For developers, Sendzai introduces native Model Context Protocol (MCP) server support and an automated CLI (sendzai). This allows custom code, LLMs, and autonomous AI agents to query session health, post status updates, lookup contacts, and dispatch message pipelines directly from terminal commands or LLM function-calls.
Best for: High-growth SaaS & e-commerce brands, marketing agencies, and AI developers building messaging-driven workflows.
- Bulk messaging
- Campaign management
- Automated outreach
- Lead generation
- Customer engagement
See the full listing - Sendzai on ScrollLaunch.
Explore these categories
More comparisons
Frequently Asked Questions
What's the difference between Relpin and Sendzai?
Relpin is Ship internal tools with production governance, while Sendzai is Agentic WhatsApp automation & developer-first MCP tools for high-growth teams.. Both are live launches in the SaaS space on ScrollLaunch - the full descriptions, pricing, and platforms for each are compared on this page.
Is Relpin or Sendzai more popular on ScrollLaunch?
Both currently have 12 community upvotes on ScrollLaunch. Upvotes reflect community interest at launch, not an endorsement or a quality verdict.
Is Relpin or Sendzai free?
Both offer a free way in - Relpin is Freemium and Sendzai is Freemium. Check each product page for current pricing details.
Should I choose Relpin or Sendzai?
It depends on your use case. Relpin is built for Engineering, ops and platform teams that build internal tools against production data. Most useful where audits, compliance or access control already matter.; Sendzai is built for High-growth SaaS & e-commerce brands, marketing agencies, and AI developers building messaging-driven workflows.. ScrollLaunch lists both as maker-submitted launches and doesn't endorse either - compare the descriptions above and visit each product page to decide.
