# Brain.fm vs Sider

Brain.fm records 2,188,538 monthly visits with -10.4% month-over-month growth and Free Trial, Paid pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.

| Metric | [Brain.fm](https://openaitools.app/tool/brain-fm) | [Sider](https://openaitools.app/tool/sider) |
| :--- | :--- | :--- |
| Website URL | https://www.brain.fm | https://sider.ai |
| Categories | AI Productivity Tools, AI Mental Health, AI Music Generator | AI Assistant, AI Chatbot, AI Writing Assistants, AI Reader |
| Pricing Model | Free Trial, Paid | Freemium |
| Monthly Visits | 2,188,538 | 2,644,740 |
| MoM Growth Rate | -10.4% | -10.6% |
| Primary Market | United States | United States |
| Direct Visits | 1,508,409 | 1,699,535 |
| Review Score | 4.2 | 4.5 |
| Saved Count | 12 | 31 |
| Supported Platforms | Website | Website |

## Brain.fm

Brain.fm takes a different approach from standard playlists: rather than curating songs, it generates music with embedded rhythmic modulation aimed at influencing brainwave activity. The company describes its patented phase-locking technology as a form of "binaural beats 2.0" that targets the prefrontal cortex, where thinking and creativity occur, rather than only the lower brain. Users can adjust the intensity of this neural effect to match how much stimulation their brain needs.

The catalog is organized by activity rather than genre. Modes cover Deep Work, Creativity, Learning, Light Work, and Motivation for focus, plus Recharge, Destress, Chill, and Unwind for relaxation, and Guided Sleep, Deep Sleep, Sleep and Wake, and Power Nap for rest. Tracks are long and lyric-free to avoid interruptions, and built-in timers support Pomodoro-style sessions, countdowns, and interval work. A dedicated ADHD mode adds extra stimulation for brains that need it.

Brain.fm is available on web, iOS, Android, and desktop, and works with or without headphones. It offers a free trial before the paid subscription, and its research, including a study published in Nature Communications, is publicly documented on its science page.

**Pricing & Plans:** Free trial followed by a paid subscription; the free trial lets new users explore the catalog and neural-effect settings before committing to a plan.

- **Functional music modes:** Activity-based music and soundscapes for Deep Work, Creativity, Learning, Motivation, sleep, and relaxation, plus guided meditation and sleep sessions.
- **Neural phase-locking:** Patented audio modulation designed to enhance and synchronize brainwave activity, with adjustable neural effect levels you can dial up or down.
- **ADHD mode:** Higher-stimulation music designed for attention difficulties, backed by research supported in part by a National Science Foundation grant.
- **Workflow timers:** Infinite count-up timers, countdown timers, and interval timers that adapt to focus and break sessions.
- **Multi-platform access:** Listen on web, iOS, Android, and desktop, with or without headphones.

**Strengths:** Backed by peer-reviewed research and a National Science Foundation grant; Modes mapped to specific activities rather than generic playlists; Lyric-free, extra-long tracks avoid distraction and repetition; Works with or without headphones across web and mobile

**Limitations:** Requires a paid subscription after the free trial; The science and terminology can feel niche to casual listeners; Long-time Spotify users may miss familiar songs and artists

[Profile (Markdown)](https://openaitools.app/tool/brain-fm.md)

## Sider

Sider's premise is that you should not have to leave the page you are reading to use an AI assistant. Its sidebar overlays the browser, detects the content in view, and responds with chat, summaries, translations or explanations using frontier models from multiple providers. The result is a lightweight research and reading workflow: highlight a paragraph, ask for a simpler explanation, translate a PDF and keep the original in sight.

Recent versions push Sider beyond chat. Sider Hand is a browser agent that works across real websites and uses your logged-in sessions to carry out multi-step jobs such as comparing prices while shopping, filling forms, doing cross-site research or triaging a Gmail inbox. Sider Code goes the other way, letting you instruct changes to a website's appearance or behaviour in plain language and preserving the customisation for next time. A Create module generates images, videos, slides and documents from the same panel.

Pricing moves from a limited free tier to credit-based paid plans aimed at heavier users. Lower plans suit occasional chat, summarisation and translation, while higher tiers add a dedicated cloud computer that keeps the browser agent running around the clock and a larger monthly credit allowance. Sider ships as browser extensions for Chrome and Edge plus desktop and mobile apps for macOS, Windows, iOS and Android, and is used by a very large installed base.

**Pricing & Plans:** Freemium. Free tier available with limited credits; paid plans advertised at roughly US$10/month for occasional use up to around US$100/month at the top tier, with higher credit allowances and a dedicated cloud computer on the upper plans.

- **AI sidebar on any page:** A persistent panel that reads the page you are on and answers follow-ups with GPT, Claude or Gemini without copying content into another tab.
- **Summarise and chat with documents:** Summarise long articles, PDFs and YouTube videos, extract key points, and ask detailed questions about the source material.
- **Translation and read-aloud:** Translate webpages, PDFs and images, compare bilingual output side by side, and have content read aloud for review on the move.
- **Sider Hand browser agent:** Delegate multi-step tasks across real websites — price comparison, form filling, research and inbox triage — using your existing logged-in sessions.
- **Sider Code page customisation:** Describe a change in plain words and have Sider restyle or simplify any website, remembering the modification for future visits.

**Strengths:** Works inside the browser you already use, with no context switching; Access to multiple frontier models from one subscription; Strong reading toolkit: PDF chat, YouTube summaries, translation and read-aloud; Increasingly capable agent features for multi-step browser tasks

**Limitations:** Useful credits run out quickly on the free and lower tiers; Model availability and quota rules change over time, so expectations must be checked per plan; Some agent and code features depend on a cloud machine and heavier plans

[Profile (Markdown)](https://openaitools.app/tool/sider.md)

## Frequently Asked Questions

### How do Brain.fm and Sider compare in monthly traffic?

Brain.fm has 2,188,538 monthly visits, while Sider has 2,644,740. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Brain.fm has a month-over-month growth rate of -10.4%; Sider has -10.6%.

### How does pricing compare?

Brain.fm: Free Trial, Paid. Free trial followed by a paid subscription; the free trial lets new users explore the catalog and neural-effect settings before committing to a plan. Sider: Freemium. Freemium. Free tier available with limited credits; paid plans advertised at roughly US$10/month for occasional use up to around US$100/month at the top tier, with higher credit allowances and a dedicated cloud computer on the upper plans.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [ChatGPT](https://openaitools.app/tool/chatgpt-4) | 6,048,022,723 | +2.2% | Freemium | OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research. | [.md](https://openaitools.app/tool/chatgpt-4.md) |
| 2 | [Claude](https://openaitools.app/tool/claude-2) | 1,253,439,413 | +23.8% | Freemium | Anthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing. | [.md](https://openaitools.app/tool/claude-2.md) |
| 3 | [Suno](https://openaitools.app/tool/suno) | 78,046,702 | +3.4% | Freemium | handle: suno | [.md](https://openaitools.app/tool/suno.md) |
| 4 | [Monica](https://openaitools.app/tool/monica-ai) | 4,512,775 | -11.3% | Freemium | Offers a very similar browser sidebar experience with multiple AI models, but features slightly different pricing and workspace tools. | [.md](https://openaitools.app/tool/monica-ai.md) |
| 5 | [Headspace](https://openaitools.app/tool/headspace) | 1,686,204 | +4.3% | Free Trial, Paid | Provides guided meditations and sleep stories for mental wellness, but offers less continuous instrumental focus music. | [.md](https://openaitools.app/tool/headspace.md) |
| 6 | [Merlin AI](https://openaitools.app/tool/merlin-ai) | 1,382,634 | +13.1% | Freemium | Provides robust browser-based summarization and prompt assistance, but lacks some of Sider's deeply integrated multi-model chat UI features. | [.md](https://openaitools.app/tool/merlin-ai.md) |
| 7 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | Excels at advanced web automation and data extraction alongside chat, but has a steeper learning curve than Sider. | [.md](https://openaitools.app/tool/harpa-ai.md) |
| 8 | [SOUNDRAW](https://openaitools.app/tool/soundraw) | 204,925 | -8.2% | Freemium, Free Trial, Paid, Contact for Pricing | Allows customizing instrumental background tracks and loops, but focuses on media production rather than cognitive enhancement. | [.md](https://openaitools.app/tool/soundraw.md) |
| 9 | [Glarity](https://openaitools.app/tool/glarity-summarize-google-and-youtube) | 188,823 | -49.6% | Freemium | Summarize YouTube, Google, and any page with AI — free in your browser | [.md](https://openaitools.app/tool/glarity-summarize-google-and-youtube.md) |
| 10 | [Kome AI](https://openaitools.app/tool/kome-ai) | 174,910 | -6.5% | Freemium | Integrates bookmark management and content composition into a clean sidebar, but has a more limited feature set than Sider. | [.md](https://openaitools.app/tool/kome-ai.md) |

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Source: https://openaitools.app/compare/brain-fm-vs-sider

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