Software Alternatives, Accelerators & Startups

Cal.com VS Superthread

Compare Cal.com VS Superthread and see what are their differences

Cal.com logo Cal.com

Cal.com (formerly Calendso) is the open source Calendly alternative.

Superthread logo Superthread

Superthread is a fast project management platform that combines task management, documentation, and AI-powered meeting notes into one app to boost productivity.
  • Cal.com Landing page
    Landing page //
    2023-10-08
  • Superthread Landing page
    Landing page //
    2024-08-24
  • Superthread Example of a card within the Roadmap Project
    Example of a card within the Roadmap Project //
    2025-08-06
  • Superthread Breakdown of task and child tasks within Roadmap
    Breakdown of task and child tasks within Roadmap //
    2025-08-06
  • Superthread Example of task board
    Example of task board //
    2025-08-06
  • Superthread Example of docs (pages)
    Example of docs (pages) //
    2025-08-06
  • Superthread Superthread summary
    Superthread summary //
    2025-08-06
  • Superthread All-in-one project management and wiki app
    All-in-one project management and wiki app //
    2025-08-06
  • Superthread Ask AI functionality for help
    Ask AI functionality for help //
    2025-08-06

Superthread is a fast project management platform that integrates tasks, documentation, and AI meeting notes into a single application. It is designed to replace multiple tools and centralize team workflows to increase productivity.

Key features include:

  • Tasks, Projects, and Sprints: Manage and organize work with a variety of views, including timeline and board views.

  • Documentation: Create and collaborate on documents and pages, eliminating knowledge silos.

  • AI Notes: This feature transcribes meetings, compares discussions to existing work, suggests tasks, and highlights decisions, allowing teams to quickly review and act on meeting outcomes.

  • Integrations: The platform integrates with other popular applications like Google Meet, Zoom, Slack, and Microsoft Teams to streamline communication and workflows.

Superthread is a comprehensive solution for teams looking to consolidate their project management and collaboration tools.

Superthread

$ Details
freemium $12.0 / Monthly (All Free features, 10 boards, 5 spaces, Unlimited file uploads)
Platforms
Web Desktop Mobile iOS
Release Date
2021 December
Startup details
Country
United Kingdom
Founder(s)
David Hasovic, Ben Bourdin, Brennan Topley
Employees
1 - 9

Cal.com features and specs

  • Customizable
    Cal.com allows extensive customization to fit various branding and scheduling needs, which makes it adaptable for different types of users including businesses and individuals.
  • Open-source
    Being an open-source platform, Cal.com provides the flexibility for developers to modify and extend the software as per their specific needs, fostering a collaborative development environment.
  • Integrations
    Cal.com offers a wide range of integrations with other software tools like Google Calendar, Microsoft Outlook, and Zoom, enhancing its functionality and making it easier to fit into existing workflows.
  • User-friendly Interface
    Cal.com has an intuitive and clean interface that makes it easy for users of all technical skill levels to set up and manage their scheduling.
  • Privacy-focused
    Cal.com emphasizes data privacy, ensuring user information is handled securely, which is crucial for users who need to comply with regulations like GDPR.

Possible disadvantages of Cal.com

  • Learning Curve
    Although it is highly customizable, the plethora of options and features may result in a steeper learning curve for new users who are not familiar with such scheduling tools.
  • Limited Free Version
    The free version of Cal.com comes with limitations that may not be sufficient for growing businesses or advanced users who require more comprehensive features.
  • Dependency on Integrations
    Cal.com's effectiveness heavily depends on its integrations. Without these integrations, some users might find the tool less useful or incomplete, especially if their primary tools are not supported.
  • Support
    While open-source has many benefits, it may also mean that immediate, personalized support could be limited compared to fully commercial solutions. This might pose a challenge for users needing quick resolutions.
  • Performance
    As an open-source platform, the performance might vary depending on how it is hosted and managed. Suboptimal configurations could lead to slower performance or downtimes.

Superthread features and specs

  • Tasks & Projects
    A centralized system for creating, assigning, and tracking tasks. Projects can be viewed in various formats, including timelines and Kanban boards.
  • Documentation
    Provides a dedicated space for creating, organizing, and collaborating on documents and internal knowledge bases to prevent information silos.
  • AI Notes
    This feature automatically transcribes meetings from platforms like Google Meet and Zoom, then uses AI to summarize discussions, suggest tasks, and highlight key decisions.
  • Sprints
    Tools for managing sprints and agile workflows, allowing teams to plan, track progress, and run retrospectives.
  • Workspaces
    The platform is organized around shared team workspaces to centralize all tasks, projects, and documents in one place.
  • Integrations
    Connects with popular apps such as Slack, GitHub, Zoom, and Google Meet to automate workflows and keep teams informed.
  • API
    Offers a public REST API for developers to build custom integrations and automate tasks.
  • Collaboration Tools
    Includes real-time editing, comments, and notifications to facilitate communication and collaboration among team members.
  • Views
    Offers multiple views for projects and tasks, such as timeline and board views, to help users visualize and manage their work effectively.
  • Guest Access
    Provides the ability to invite external collaborators with "view only" permissions, allowing for secure collaboration with clients or partners.
  • Importing from Other Tools
    Superthread provides native import functionality for migrating projects and data from competing services like Trello, Jira, and Shortcut.
  • Card Cover Images
    Visualise your workflows within sprints and kanban boards with card cover images.

Analysis of Cal.com

Overall verdict

  • Cal.com is generally considered a good option for scheduling and calendar management.

Why this product is good

  • Cal.com is praised for its open-source nature, allowing for greater customization and integration flexibility. It offers a user-friendly interface and supports various calendar integrations, making it a versatile tool for individuals and businesses alike.

Recommended for

  • Freelancers who need a simple yet effective scheduling tool.
  • Small businesses looking for a customizable scheduling solution.
  • Developers who appreciate open-source software and need a tool they can modify.
  • Businesses seeking a platform that can integrate with existing tools and workflows.

Analysis of Superthread

Overall verdict

  • Superthread is a solid all-in-one project management and collaboration tool that combines tasks, docs, and communication in a clean, modern interface, making it a good choice for teams looking to consolidate their workflow into a single platform.

Why this product is good

  • Combines project management, documents, and team communication in one unified workspace, reducing tool-switching
  • Clean, intuitive, and modern user interface that is easy to onboard and adopt
  • Flexible views including boards, lists, and timelines to suit different working styles
  • Real-time collaboration features that keep teams aligned
  • Nested pages and docs support that help centralize knowledge alongside tasks

Recommended for

  • Small to medium-sized teams looking for an all-in-one collaboration hub
  • Startups and product teams that want to consolidate multiple tools
  • Remote and distributed teams needing integrated task management and documentation
  • Teams frustrated with juggling separate apps for tasks, docs, and communication

Cal.com videos

What can you do with Cal? | Cal.com Version 1.1 Launch | 10 new languages

More videos:

  • Review - Cal.com Version 1.0 Launch Event

Superthread videos

Superthread Platform Demo

More videos:

  • Tutorial - Superthread Boards Tutorial
  • Tutorial - Superthread Cards (Tasks) Tutorial
  • Tutorial - Superthread Sprints Tutorial
  • Tutorial - Superthread Pages (docs) Tutorial
  • Tutorial - Superthread AI-Powered Notes Tutorial
  • Tutorial - Superthread Views Tutorial
  • Tutorial - Superthread Spaces Tutorial

Category Popularity

0-100% (relative to Cal.com and Superthread)
Appointments and Scheduling
Project Management
0 0%
100% 100
Calendar And Scheduling
100 100%
0% 0
Task Management
0 0%
100% 100

Questions & Answers

As answered by people managing Cal.com and Superthread.

What's the story behind your product?

Superthread's answer:

  • The Problem: David Hasovic, an experienced engineer with a background in creating high-performance software and game engines, grew frustrated with the inefficiency of tools like Jira and Confluence. He found that most project management platforms were technically complex, had poor performance, and forced teams to switch between multiple applications to manage tasks, documents, and discussions.

  • The Vision: He set out to build a new platform with the same standards of speed, resilience, and design polish found in high-performance games. The core idea was to create a "blazing-fast" tool that would bring tasks, documentation, and meetings together in a single, well-designed application.

  • The Journey: The journey was not simple. David described it as a "David vs. Goliath" story, going up against giants in the industry. The technical challenge of building a collaborative tool with both a task tracker and a rich text editor was immense, and the initial prototype code had to be completely scrapped to achieve the desired performance goals.

  • The Philosophy: Superthread's philosophy is rooted in "relentless attention to detail, engineering quality, and speed of execution." The team's goal is to ship fast and obsess over the user experience, ensuring the product is reliable whether a team has 10 tasks or 10 million. They focus on delivering a high-quality product without relying on marketing hype or "vapourware."

Which are the primary technologies used for building your product?

Superthread's answer:

  • Backend: The backend is built primarily with Go (Golang). This choice emphasizes the company's focus on high performance, concurrency, and reliability, which are key strengths of the Go language.

  • Frontend: The frontend is built using Vue.js, a popular JavaScript framework known for its simplicity and performance. The team has also been working on migrating from Vue 2 to Vue 3, indicating a commitment to modernizing their codebase.

  • Database: Superthread utilizes DynamoDB, a NoSQL database service from AWS. This choice is often made for its scalability and performance at a large scale, which aligns with Superthread's goal of handling millions of records without a loss of speed.

  • Other Technologies: The platform also incorporates TypeScript for adding static typing to the frontend, AWS for its cloud infrastructure, and WebSockets for real-time data communication, which is crucial for collaborative features.

Who are some of the biggest customers of your product?

Superthread's answer:

  • Acceler8 Talent: A technical recruitment company that used Superthread to unify global collaboration and reduce candidate review time by 30%.

  • Videra Health: An AI-powered health tech company that consolidated its scattered work from multiple tools (Monday, Shortcut, Notion) into Superthread to streamline operations.

  • Inblick: An AI data analytics platform that uses Superthread to consolidate both its engineering and non-engineering workflows to avoid losing context between different tools.

  • Medialab: A UK-based independent media agency that needed a solution to spread knowledge across its rapidly expanding business, switching from tools like Jira and Confluence.

  • AMD: Advanced Micro Devices (AMD) is a global semiconductor company known for designing and manufacturing microprocessors, graphics processing units (GPUs), and other related technologies.

  • lastminute.com: lastminute.com is the European Travel Tech leader in Dynamic Holiday Packages, giving holidaymakers access to millions of combinations of travel solutions in real-time.

  • IKEA: IKEA is a global home furnishing brand known for its modern, functional, and affordable furniture and home accessories, often sold in flat-pack form for customer assembly.

  • Grabyo: Grabyo is a cloud-based video platform focused on live production, clipping, and editing for broadcasters, publishers, and media organizations.

  • mercado libre: Mercado Libre is a leading e-commerce and online payments platform in Latin America.

  • AIRBUS: Airbus is a leading European aerospace corporation specializing in the design, manufacturing, and maintenance of commercial aircraft, as well as defense and space systems and helicopters.

Why should a person choose your product over its competitors?

Superthread's answer:

  • All-in-One Solution: Superthread is designed to replace multiple applications by integrating project management, documentation, and meetings into a single, cohesive platform. This eliminates the need for constant context switching between tools like Jira, Notion, and Slack.

  • AI-Powered Meeting Notes: A key differentiator is the built-in AI functionality that automatically transcribes meetings from platforms like Zoom and Google Meet. It then uses this information to suggest tasks, highlight key decisions, and update project-related documents, streamlining the workflow from discussion to action.

  • Speed and User Experience: The platform is engineered for high performance, with a clean, intuitive, and "blazing-fast" interface. Users frequently praise its ease of use and responsive design, which reduces friction and makes project management more enjoyable, even for non-technical team members.

  • Focused on "Builders": Superthread is specifically targeted at "builder" teams, such as software and product developers. It offers features and a workflow that cater to the needs of these teams, providing a more streamlined and relevant experience than more general-purpose or enterprise-focused tools.

  • Flexible and Customizable: While designed for speed, Superthread still offers a good degree of flexibility. Users can create custom views, define their own task statuses, and use tags to organize work in a way that fits their specific team's workflow.

What makes your product unique?

Superthread's answer:

  • Integrated Tasks, Docs, and Meetings: Unlike many competitors that require separate tools for project management (Jira), documentation (Confluence/Notion), and meeting notes, Superthread combines all three. This prevents "tool sprawl" and the need for constant context switching.

  • AI-Powered Meeting Notes: A standout feature is its AI Notes capability. The platform can transcribe meetings, automatically compare the discussion to existing work, and then suggest new tasks and action items, which can be reviewed and assigned with minimal effort.

  • Focus on Speed and Performance: The company emphasizes that its platform is "blazing-fast," a deliberate design choice intended to differentiate it from larger, more complex tools that can sometimes be slow or cumbersome. This focus on performance is a key part of its value proposition.

  • Built for "Builders": Superthread positions itself as a tool designed by and for builders, such as software and product teams. It aims to provide a fast, efficient, and well-designed experience that caters specifically to the needs of technical users.

How would you describe the primary audience of your product?

Superthread's answer:

  • Engineering and Product Teams: Superthread is designed to meet the specific needs of these teams by combining task management with documentation in a single platform, streamlining their workflows.

  • Teams Consolidating Tools: Companies that are tired of using separate applications for project management (e.g., Jira), documentation (e.g., Notion), and team communication (e.g., Slack) represent a core target market.

  • Remote and Hybrid Teams: The centralized nature of the platform makes it well-suited for distributed teams that need a single source of truth for all their work and discussions.

  • Startups: With a pricing model that includes a free tier for unlimited users and a startup program offering significant discounts, Superthread is an attractive option for new, growing companies seeking an efficient, scalable solution.

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Cal.com and Superthread

Cal.com Reviews

Acuity Scheduling alternatives for businesses outgrowing it
The honest read: if you're leaving Acuity because your business outgrew simple scheduling โ€” you need deposits, add-ons, multiple staff and locations, and ideally a booking site you own โ€” Opencals is built for exactly that transition, and pay-as-you-go means it costs nothing until you're earning. If you're leaving for a narrower reason, match it precisely: SimplyBook.me for...
Source: opencals.com
I've poked around a while ago at some Calendly alternatives (specifically was lo... | Hacker News
I tried using https://cal.com for a bit but ended up just switching over to https://zcal.co and it has been great so far. All these other scheduling tools end up trying to do too much and always seem to end up a bit clunky and charge absurd amounts for it

Superthread Reviews

We have no reviews of Superthread yet.
Be the first one to post

Social recommendations and mentions

Based on our record, Cal.com seems to be a lot more popular than Superthread. While we know about 60 links to Cal.com, we've tracked only 1 mention of Superthread. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Cal.com mentions (60)

  • "You Wouldnโ€™t Steal a DIV": How I Built My Portfolio
    Then for the component library, I was really into coss ui. I stumbled upon it randomly one day and loved it so much. My Nathan's AI project already had a UI heavily inspired by cal.com: send button, message suggestions... So when I saw they had a shadcn/ui library with that kind of style, it was perfect for what I needed. - Source: dev.to / 4 months ago
  • AI Almost Sold Me a Subscription I Didn't Need
    I keep coming back to what would have happened if I didn't have a strong technical understanding of how calendar technology works โ€” the difference between local and cloud calendars, what an ICS feed is, why enterprise auth blocks third-party integrations. If this was many years ago before I gained all this experience, I would have stopped at the first confident answer from my search tool, installed one of those... - Source: dev.to / 5 months ago
  • Introducing Quackback: Open-Source Feedback Platform with a Built-in MCP Server
    Plausible brought open source to web analytics. Cal.com did it for scheduling. Formbricks did it for surveys. PostHog did it for product analytics. Quackback does it for feedback collection. - Source: dev.to / 5 months ago
  • ๐Ÿค Learn Front-End by Doing: Contribute to Cal.com's Open Source...๐Ÿš€
    In this tutorial, we'll be focusing on Cal.com:. - Source: dev.to / 12 months ago
  • 5 Side Project Ideas for Developers to Monetize as Micro-SaaS in 2025
    Take Cal.com (https://cal.com/), formerly known as Calendso. It started as an open source alternative to Calendly which offers a free, self-hostable version for users. - Source: dev.to / over 1 year ago
View more

Superthread mentions (1)

  • Ask HN: What's a modern alternative to Confluence for small dev teams?
    You're hitting on the biggest problem with dev docs: they're always scattered because well they just want to jump straight back into coding. For what you're describing, a place for onboarding, docs, and connecting to dev tools like GitHub, Superthread is a good fit. The layout is a lot more opinionated than Notion to reduce clunky navigation or UI. Itโ€™s a place where docs and tasks are connected, so you're not... - Source: Hacker News / 10 months ago

What are some alternatives?

When comparing Cal.com and Superthread, you can also consider the following products

Calendly - Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.

Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.

TidyCal - Optimize your schedule with custom booking pages and calendar integrations

Fibery - Work management platform that adapts to companies and grows with them.

Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.

Jira - The #1 software development tool used by agile teams. Jira Software is built for every member of your software team to plan, track, and release great software.