# Sider vs Truth Keeper

Sider records 2,644,740 monthly visits with -10.6% month-over-month growth and Freemium pricing. Truth Keeper records 0 monthly visits with — growth and Free pricing.

| Metric | [Sider](https://openaitools.app/tool/sider) | [Truth Keeper](https://openaitools.app/tool/truth-keeper) |
| :--- | :--- | :--- |
| Website URL | https://sider.ai | https://chromewebstore.google.com/detail/truth-keeper/pgbhljjccjkghhcjhkmhoejlgdddllla |
| Categories | AI Assistant, AI Chatbot, AI Writing Assistants, AI Reader | AI Content Detector, Large Language Models (LLMs), AI Checker |
| Pricing Model | Freemium | Free |
| Monthly Visits | 2,644,740 | 0 |
| MoM Growth Rate | -10.6% | — |
| Primary Market | United States | Global |
| Direct Visits | 1,699,535 | 0 |
| Review Score | 4.5 | 3.1 |
| Saved Count | 31 | 0 |
| Supported Platforms | Website | Browser Extension |

## 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)

## Truth Keeper

Truth Keeper is a compact Chrome extension built around one job: give you a fast second opinion on whether a claim, paragraph, or article is credible. You feed text into the extension, an LLM-backed pipeline examines it, and the result comes back as a true-or-false label with an accuracy percentage so you can see how confident the assessment is.

The extension is deliberately minimal. There is no dashboard, no team workspace, and no long onboarding — it installs from the Chrome Web Store, sits in your toolbar, and works whenever you want to sanity-check something you are reading. The developer states that the extension does not collect or use your data, which matters for people who paste sensitive internal or personal text.

Because the verdicts come from a general-purpose language model, Truth Keeper is best treated as a screening aid that flags suspicious claims for further checking, not as an authoritative referee. Users who need sourced evidence should combine it with a fact-checking service that cites references.

**Pricing & Plans:** Free to install from the Chrome Web Store; no paid tiers are advertised.

- **True-or-false verdicts:** Submit any block of text and receive a clear true or false label back in the browser.
- **Accuracy percentage:** Each verdict arrives with a confidence score so you can judge how decisive the model was.
- **LLM-backed analysis:** Uses advanced large language models rather than a static keyword blocklist to reason about claims.
- **In-browser convenience:** Lives in the Chrome toolbar as a small 146 KB extension, so checks happen without leaving the page.
- **No data collection declared:** The developer states the extension does not collect or sell user data.

**Strengths:** Free with no account or signup required; Extremely small footprint and simple interface; Returns both a verdict and a numeric confidence level; Developer declares no data collection or resale

**Limitations:** No cited sources or evidence trail behind verdicts; Last updated in 2024 with a very small user base; LLM verdicts on factual claims can be wrong or overconfident

[Profile (Markdown)](https://openaitools.app/tool/truth-keeper.md)

## Frequently Asked Questions

### How do Sider and Truth Keeper compare in monthly traffic?

Sider has 2,644,740 monthly visits, while Truth Keeper has 0. 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%; Truth Keeper has —.

### 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. Truth Keeper: Free. Free to install from the Chrome Web Store; no paid tiers are advertised.

## 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 | [ZeroGPT](https://openaitools.app/tool/zerogpt) | 32,864,541 | +19.7% | Freemium, Paid | AI content detection and a full writing toolkit in one place | [.md](https://openaitools.app/tool/zerogpt.md) |
| 4 | [GPTZero](https://openaitools.app/tool/gptzero-me) | 23,246,989 | +32.5% | Freemium, Paid | AI detection and writing verification built for schools and editors | [.md](https://openaitools.app/tool/gptzero-me.md) |
| 5 | [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) |
| 6 | [Originality.ai](https://openaitools.app/tool/originality) | 2,049,639 | +2.8% | Paid | AI detector, plagiarism and content-quality checks in one scan | [.md](https://openaitools.app/tool/originality.md) |
| 7 | [Merlin AI](https://openaitools.app/tool/merlin-ai) | 1,382,634 | +13.1% | Freemium | One-click AI assistant for browsing, writing and research | [.md](https://openaitools.app/tool/merlin-ai.md) |
| 8 | [Isgen AI Detector](https://openaitools.app/tool/isgen-ai) | 901,917 | +5.8% | Freemium | Multilingual AI detector with sentence-level insight | [.md](https://openaitools.app/tool/isgen-ai.md) |
| 9 | [Winston AI](https://openaitools.app/tool/winston-ai) | 604,454 | +5.4% | Freemium, Free Trial | Detect AI-generated text and images with benchmark-tested accuracy | [.md](https://openaitools.app/tool/winston-ai.md) |
| 10 | [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) |

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Source: https://openaitools.app/compare/sider-vs-truth-keeper

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