# Email Tracker vs Sider

Email Tracker records 8,240 monthly visits with -60.3% month-over-month growth and Freemium pricing. Sider records 2,644,740 monthly visits with -10.6% growth and Freemium pricing.

| Metric | [Email Tracker](https://openaitools.app/tool/email-tracker) | [Sider](https://openaitools.app/tool/sider) |
| :--- | :--- | :--- |
| Website URL | https://emailtracker.cc | https://sider.ai |
| Categories | Other | AI Assistant, AI Chatbot, AI Writing Assistants, AI Reader |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 8,240 | 2,644,740 |
| MoM Growth Rate | -60.3% | -10.6% |
| Primary Market | United States | United States |
| Direct Visits | 3,523 | 1,699,535 |
| Review Score | 3.8 | 4.5 |
| Saved Count | 1 | 31 |
| Supported Platforms | Website | Website |

## Email Tracker

Email Tracker is a lightweight Chrome extension built specifically for Gmail users who want to know what happens after they hit send. Once installed, it reports opens, link clicks and attachment views with real-time notifications through Chrome or email, so sales reps, founders and freelancers can decide when to follow up instead of guessing. A visible tracking mode deliberately signals to the recipient that the message is being tracked, which the vendor claims lifts reply rates, while an invisible mode keeps tracking discreet.

The product keeps its pricing simple: a free plan tracks an unlimited number of emails with the full tracking history and email alerts, and a Professional plan priced at roughly $3.99 per month yearly removes the Email Tracker signature, unlocks unlimited link tracking and adds Chrome notifications together with the ability to toggle invisible and visible modes. Teams can also be billed together.

The vendor emphasizes privacy: it says it stores only the open dates of tracked emails rather than recipient addresses or message content, uses standard encryption between device and servers, and complies with data protection rules including GDPR. It is aimed at individuals and small sales teams that want the essentials of an email tracking tool without adopting a full sales engagement platform. If you need deep CRM sync, sequences or multi-channel dialer features, this is a narrower tool.

**Pricing & Plans:** Free forever plan with unlimited tracked emails, the Email Tracker signature and a limited number of invisible tracker sends. The Professional plan costs about $3.99 per month on annual billing and adds unlimited link tracking, signature removal, invisible/visible toggling and Chrome notifications. Team billing is available.

- **Real-time open notifications:** Get alerted through Chrome notifications or email the moment your message is opened, so you can time a follow-up while the interest is fresh.
- **Detailed engagement insights:** See how many times and exactly when a recipient accessed your email, which helps identify the messages and segments that actually land.
- **Link and attachment tracking:** Know when someone clicks a link in your message or opens an attached file, not just whether the email was opened.
- **Visible or invisible tracking:** Choose a visible tracker to encourage replies, or an invisible tracker when you prefer recipients not to know.
- **Follow-up history:** Keep your full tracking history so you can build follow-up sequences based on how often prospects engage.

**Strengths:** Free plan genuinely tracks unlimited emails with no cap on volume; Installs as a Chrome extension and layers onto Gmail without changing how you write email; Real-time notifications make timely follow-ups practical; The visible tracker option is an unusual, effective nudge toward higher reply rates

[Profile (Markdown)](https://openaitools.app/tool/email-tracker.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 Email Tracker and Sider compare in monthly traffic?

Email Tracker has 8,240 monthly visits, while Sider has 2,644,740. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Email Tracker has a month-over-month growth rate of -60.3%; Sider has -10.6%.

### How does pricing compare?

Email Tracker: Freemium. Free forever plan with unlimited tracked emails, the Email Tracker signature and a limited number of invisible tracker sends. The Professional plan costs about $3.99 per month on annual billing and adds unlimited link tracking, signature removal, invisible/visible toggling and Chrome notifications. Team billing is available. 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 | [Duck.ai](https://openaitools.app/tool/duck-ai) | 26,431,539 | +10.7% | Free | Private AI chat from the makers of DuckDuckGo | [.md](https://openaitools.app/tool/duck-ai.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 | [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 | [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) |
| 7 | [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) |
| 8 | [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) |
| 9 | [Dex — Personal CRM & LinkedIn Assistant](https://openaitools.app/tool/linkedin-gpt-assistant-by-dex) | 156,354 | +1.6% | Paid | The personal CRM that keeps your network warm — with your LinkedIn graph baked in | [.md](https://openaitools.app/tool/linkedin-gpt-assistant-by-dex.md) |
| 10 | [Voilà — AI Assistant, Chat and Writer](https://openaitools.app/tool/voil-chatgpt-browser-assistant) | 152,170 | -4.8% | Freemium | Delivers streamlined inline writing and webpage summarization via a browser extension, but with fewer custom sidebar tools. | [.md](https://openaitools.app/tool/voil-chatgpt-browser-assistant.md) |

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Source: https://openaitools.app/compare/email-tracker-vs-sider

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