# ButterKit vs Sider

ButterKit records 6,055 monthly visits with -14.5% month-over-month growth and Freemium pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.

| Metric | [ButterKit](https://openaitools.app/tool/butterkit) | [Sider](https://openaitools.app/tool/sider) |
| :--- | :--- | :--- |
| Website URL | https://butterkit.app | https://sider.ai |
| Categories | AI Agent, AI Translate, AI Graphic Design, AI Mockup Generator | AI Assistant, AI Chatbot, AI Writing Assistants, AI Reader |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 6,055 | 2,644,740 |
| MoM Growth Rate | -14.5% | -10.6% |
| Primary Market | United States | United States |
| Direct Visits | 2,400 | 1,699,535 |
| Review Score | 4.6 | 4.5 |
| Saved Count | 0 | 31 |
| Supported Platforms | Website | Website |

## ButterKit

ButterKit is a Mac-only screenshot studio built for app developers and marketing teams who ship to the App Store. Instead of assembling mockups in a browser tool, you install a native app that connects to your existing development workflow. Screenshots come in three ways: drag-and-drop of PNG or JPG files, a one-click capture from the Xcode Simulator Device Hub, or a linked folder such as a Fastlane screenshot directory that keeps artboards in sync automatically.

Once images are in, ButterKit renders them inside photorealistic 3D device frames powered by Metal, so you can rotate a phone, tablet or watch to any angle and preview edits at high frame rates. Design controls cover fonts, gradients, backgrounds and bundled templates, plus a community marketplace of additional template packs. Panning a device across multiple artboards lets you build seamless panoramic backgrounds that tie a screenshot set together.

The other half of the product is localization and publishing. ButterKit translates both screenshots and app metadata into the full set of App Store Connect languages, keeping the design synced across every language version, and can upload the finished set directly to App Store Connect in the correct order. An app preview mode shows how the app's story will look on each device and locale. There is also MCP support so AI coding agents can drive capture, design updates and localization, and because everything runs locally there are no accounts, servers or cloud storage involved.

**Pricing & Plans:** Freemium model with a one-time purchase option alongside optional subscriptions that support ongoing development. Because the app runs entirely on your machine with no server costs, the developer can offer perpetual licensing; current figures and downloads are on the official pricing page.

- **Capture straight from Xcode:** One click grabs a screenshot from the Xcode Simulator Device Hub and imports it as a new artboard, so you can iterate on designs as fast as you can build.
- **Fastlane and folder sync:** Link a folder of images — for example a Fastlane or UI-test output directory — and your artboards update automatically whenever new localizations land.
- **Real 3D device frames on Metal:** Place screenshots inside high-resolution 3D devices, rotate them to any angle and pan across artboards for panoramic backgrounds, all rendered smoothly up to 120fps.
- **Translation for App Store languages:** Localize screenshots and app metadata into the full set of App Store Connect languages from one artboard, with designs staying in sync across languages.
- **Direct upload and AI agent support:** Batch-export images or publish them straight to App Store Connect in the correct order, and optionally let AI/MCP agents handle design, updates and localization for you.

**Strengths:** Native macOS performance with 3D rendering up to 120fps; One-time purchase option alongside subscriptions; Runs locally with no accounts, ads or cloud storage; Captures directly from Xcode Simulator and syncs with Fastlane folders

**Limitations:** Mac-only, so Windows and Linux teams cannot use it; Requires an Apple development environment to get the most value; Extra community template packs may cost more on top of the app

[Profile (Markdown)](https://openaitools.app/tool/butterkit.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 ButterKit and Sider compare in monthly traffic?

ButterKit has 6,055 monthly visits, while Sider has 2,644,740. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

ButterKit has a month-over-month growth rate of -14.5%; Sider has -10.6%.

### How does pricing compare?

ButterKit: Freemium. Freemium model with a one-time purchase option alongside optional subscriptions that support ongoing development. Because the app runs entirely on your machine with no server costs, the developer can offer perpetual licensing; current figures and downloads are on the official pricing page. 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 | [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) |
| 4 | [Kittl](https://openaitools.app/tool/kittl) | 1,956,722 | -7.2% | Freemium | Design, generate, and ship branded visuals with leading AI models on one canvas | [.md](https://openaitools.app/tool/kittl.md) |
| 5 | [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) |
| 6 | [DesignKit (Meitu Design Studio)](https://openaitools.app/tool/%E7%BE%8E%E5%9B%BE%E8%AE%BE%E8%AE%A1%E5%AE%A4) | 835,524 | +21.1% | Freemium | All-in-one AI design platform for e-commerce and marketing visuals | [.md](https://openaitools.app/tool/%E7%BE%8E%E5%9B%BE%E8%AE%BE%E8%AE%A1%E5%AE%A4.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 | [Zawa](https://openaitools.app/tool/zawa) | 494,646 | -32% | Freemium | Your on-brand AI agent for logos, posters, product photos, and social video | [.md](https://openaitools.app/tool/zawa.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/butterkit-vs-sider

More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)