
Replika
JanitorAI
ChatGPT
DreamGF
AI Dungeon
Spicy Chat AI
NovelAI
Engage in open-ended conversations and collaborations with AI-based characters and create your own characters for yourself and others to enjoy. Character.ai is a social platform for creating and interacting with advanced AI chatbots.

Documize
ReadTheDocs
Boardist
Dokit
Twake
Typora
Widget-Board
Fast and flexible, real-time collaborative markdown, inspired by Hackpad.

Which is more popular?
Based on our record, HackMD seems to be a lot more popular than character.ai. While we know about 76 links to HackMD, we've tracked only 3 mentions of character.ai.
Website, pricing, platforms and company facts side by side.
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| Website | character.ai | hackmd.io |
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What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of character.ai yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
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hackmd.io opensource application review
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using character.ai and HackMD. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


You can build a character that’s gentle, fiery, or downright feral — then switch up the tone mid-conversation. The platform is surprisingly flexible with mood shifts, so if you start with pillow talk and end up deep...
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Recommendations tracked on public social media and blogs since March 2021.


– In 2024, Apple released a technical paper revealing that "Apple Intelligence" was trained on TPUs, bypassing NVIDIA entirely – Top AI models like Claude (Anthropic), Midjourney, and Character.ai rely heavily on Google because they... - Source: dev.to / 9 months ago
Honestly, 2025 is already insane enough. Platforms like Character AI and Pollybuzz are absolutely exploding. Millions of people around the world wake up and the first thing they say is “good morning” to their AI girlfriend, then spend... - Source: dev.to / 11 months ago
Meta's mission is to build the future of human connection totally makes sense if you assume they believe that the future of human connection is with an AI friend. That https://character.ai is so enormously popular with people who are... - Source: Hacker News / 12 months ago
Live preview. StackEdit, Dillinger, Markdown Live Preview, HackMD, and VS Code with its preview pane open. Toast UI Editor ships both modes and lets you switch. - Source: dev.to / about 2 months ago
Many of the suggestions in this thread (min-release, ignore script) are defenses for the consumers. I've been working on Proof of Resilience, a set of 4 metrics for OSS, and using that as a scoring oracle for what to fund. Popularity... - Source: Hacker News / 6 months ago
Bluetooth works most reliably across all devices (within its limited range), but all these p2p apps are indeed moving towards multi-transport support to diversify and widen the connectivity grid: https://hackmd.io/@grjte/bitchat-wifi-aware. - Source: Hacker News / 9 months ago
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ChatGPT is a powerful, open-source language model.
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