Twilio

Novu

Customer Communication Platforms

Add email, push, and in-app notifications to your app.

A limited free cloud plan is available. More workflow runs and features require payment.

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Customer.ioNotificationAPI

Cal.com

Appointment Scheduling Tools

Manage availability and booking links with a scheduling platform that supports self-hosting.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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CalendlyDoodle

NocoDB

Low-Code/No-Code Platforms

Transform databases into intuitive spreadsheets instantly.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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AirtableGoogle Sheets

Rocket.Chat

Team Chat & Messaging Tools

Self-hosted team messaging with voice, video, and AI.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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DiscordMicrosoft Teams

ToolJetProduct logo · See the interface on the official website

ToolJet

Low-Code/No-Code Platforms

Build internal tools rapidly without coding.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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RetoolSoftr

Zitadel

Authentication & SSO Providers

Secure, customizable identity infrastructure for developers.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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SupabaseAuth0

BotpressAI

AI Agent Platforms

Build powerful AI agents with cutting-edge LLM technology.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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ManychatVoiceflow

Convex

Backend-as-a-Service (BaaS) Tools

Build full-stack apps with TypeScript and real-time sync.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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SupabaseMongoDB

Mautic

Marketing Automation Tools

Open source marketing automation for everyone.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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HubSpotMailchimp

Healthchecks

Uptime Monitoring Tools

Get alerted when cron jobs and scheduled tasks miss their run.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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BetterStackUptimeRobot

Invoice Ninja

Invoicing & Payment Tools

Send invoices, accept payments, manage your business—all free.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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QuickbooksXero

Fonoster

Customer Communication Platforms

Open-source cloud communications platform for developers.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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Twilio

OneUptime

Performance Monitoring (APM) Tools

Comprehensive monitoring and incident management platform.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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DataDogOpsgenie

Frappe CRM

CRM Systems

Open-source CRM that puts simplicity and control first.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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SalesforceHubSpot

Chaskiq

Customer Communication Platforms

Open-source customer communication platform.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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LiveChatOpen

Dittofeed

Customer Communication Platforms

Open-source customer engagement platform for automation.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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MailchimpBrevo

Authgear

Authentication & SSO Providers

Managed identity and access management for any app.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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Auth0Clerk

Storyden

Wiki Software

Build lasting communities with modern forum technology.

We have not checked this tool’s current pricing. Visit its official website before choosing a plan.

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SkoolCircle