# Sider vs WebFill

Sider records 2,644,740 monthly visits with -10.6% month-over-month growth and Freemium pricing. WebFill records 2,044 monthly visits with -12.5% growth and Freemium pricing.

| Metric | [Sider](https://openaitools.app/tool/sider) | [WebFill](https://openaitools.app/tool/webfill) |
| :--- | :--- | :--- |
| Website URL | https://sider.ai | https://webfill.co |
| Categories | AI Assistant, AI Chatbot, AI Writing Assistants, AI Reader | AI Forms, AI Chatbot, AI Email Assistant, AI Email Generator |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 2,644,740 | 2,044 |
| MoM Growth Rate | -10.6% | -12.5% |
| Primary Market | United States | Global |
| Direct Visits | 1,699,535 | 805 |
| Review Score | 4.5 | 4.1 |
| Saved Count | 31 | 0 |
| Supported Platforms | Website | Website |

## 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)

## WebFill

WebFill is an AI browser extension built around repetitive web work: filling forms, completing surveys, entering data, answering multiple-choice questions and drafting emails. It uses advanced AI models to read what is on a page and act on it, and it can also work from a PDF, pasted text or the intelligent instruction setup you save for each website.

A distinguishing feature is WebFill Vision. Designed for students and professionals, it lets you capture any part of your screen and get instant answers — the company describes it as operating within your browser for tasks such as MCQs and online assessments. The extension also includes a chatbot for general questions and email assistance that can generate or respond to messages from your inbox.

Pricing is tiered. The Free plan covers 1K words per month, basic support, basic AI models, automated form filling and 20 Vision uses per month. The Standard plan at $7.99/month raises that to 100K words and 400 Vision uses with priority support and access to the most powerful models, while the Premium plan at $19.99/month offers 250K words, 1,000 Vision uses and enterprise-level data security. WebFill reports over 1K active users, 8K+ customers and millions of Vision launches and chats, and it also runs an affiliate program.

**Pricing & Plans:** Freemium. Free plan: 1K words/month, basic models, 20 Vision uses. Standard: $7.99/mo (100K words, 400 Vision uses). Premium: $19.99/mo (250K words, 1,000 Vision uses, enterprise-level data security). Annual billing saves 20%.

- **Automatic form filling:** WebFill detects fields on a page and completes forms, surveys and data-entry screens automatically, learning per-site instructions over time.
- **Screenshot analysis with Vision:** WebFill Vision captures any part of your screen and returns answers, aimed at multiple-choice questions, online assessments and on-screen content.
- **AI email generation:** Generate or reply to emails straight from your inbox by pressing the WebFill button and letting the AI draft the response.
- **Task and data-entry automation:** Upload a PDF or paste text and let WebFill handle repetitive data entry, MCQ solving and survey completion with saved instructions per website.
- **Tiered plans and models:** Choose from free, Standard and Premium plans with increasing word budgets, Vision usage and access to more powerful AI models.

**Strengths:** Automates genuinely tedious work like forms, surveys and data entry; WebFill Vision reads on-screen content for quick answers; Saves per-website instructions so repeated tasks get faster over time; Handles email drafting and replies from directly inside your inbox

**Limitations:** Vision features aimed at exam and MCQ answering sit in a gray area with many schools' and employers' policies; Word and Vision usage are capped by plan, so heavy users may hit limits quickly; The free tier is limited to 1K words per month with basic models and 20 Vision uses

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

## Frequently Asked Questions

### How do Sider and WebFill compare in monthly traffic?

Sider has 2,644,740 monthly visits, while WebFill has 2,044. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Sider has a month-over-month growth rate of -10.6%; WebFill has -12.5%.

### How does pricing compare?

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. WebFill: Freemium. Freemium. Free plan: 1K words/month, basic models, 20 Vision uses. Standard: $7.99/mo (100K words, 400 Vision uses). Premium: $19.99/mo (250K words, 1,000 Vision uses, enterprise-level data security). Annual billing saves 20%.

## 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 | All-in-one AI assistant across web, browser, desktop and mobile | [.md](https://openaitools.app/tool/monica-ai.md) |
| 4 | [Fillout](https://openaitools.app/tool/fillout-com) | 3,923,917 | -9.7% | Freemium | Build powerful forms, surveys and quizzes with AI in minutes | [.md](https://openaitools.app/tool/fillout-com.md) |
| 5 | [Sider](https://openaitools.app/tool/sider-ai-extension) | 2,644,740 | -10.6% | Freemium | Your AI agent for the browser: chat, automate and create from one sidebar | [.md](https://openaitools.app/tool/sider-ai-extension.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 | [forms.app](https://openaitools.app/tool/forms-app) | 987,157 | -11.2% | Freemium, Paid | Build forms, surveys and quizzes in seconds — with unlimited free responses | [.md](https://openaitools.app/tool/forms-app.md) |
| 8 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | One browser agent that combines every major AI model with web automation | [.md](https://openaitools.app/tool/harpa-ai.md) |
| 9 | [HyperWrite](https://openaitools.app/tool/hyperwrite-ai) | 255,429 | +34.4% | Freemium | AI writing assistant with autocomplete, research, and a Chrome extension | [.md](https://openaitools.app/tool/hyperwrite-ai.md) |
| 10 | [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) |

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Source: https://openaitools.app/compare/sider-vs-webfill

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