Spellar AI vs Otter.AI vs Knowly AI vs Goodnotes: Which Email Writing Tool tool is Best in 2025?

All these tools Spellar AI , Otter.AI , Knowly AI , Goodnotes offer flexible pricing models suitable for sales professionals, content creators seeking AI-powered solutions to enhance their Email Writing Tool efforts.

Spellar AI

Starting from
$8/month

Otter.AI

Starting from
Free

Knowly AI

Starting from
$7.9/month

Goodnotes

Starting from
custom
Pricing Model:
  • Free - $0
  • All Platforms Yearly - Custom

These AI tools are among the best Email Writing Tool tools available in 2025. For sales professionals, content creators, tools like Spellar AI , Otter.AI , Knowly AI , Goodnotes help streamline the Email Writing Tool process by offering AI-powered features.

What is Spellar AI?

Spellar AI is an innovative, bot-free AI meeting note-taker launched in 2023, designed to enhance productivity by automating note-taking and analysis for macOS, iOS, iPad, and web users. As of June 4, 2025, at 03:58 PM IST, Spellar has gained recognition for its ability to transcribe conversations in over 100 languages, generate smart summaries, and integrate seamlessly with tools like Notion, Google Docs, Jira, and Confluence. It is particularly valued for its privacy-centric approach and cross-platform accessibility, making it a top choice for professionals, students, and remote teams.

What is Otter.AI?

Otter AI is an AI meeting assistant. Otter AI provides solutions for business, sales, education, and media. For businesses, it helps improve business meetings by taking automatic meeting notes. For sales, the Otter sales autopilot helps organizations close deals and onboard new clients quickly. For education, it assists students and teachers with real-time notes and captions. For Media, Otter creates compelling stories by transcribing audio and video files.

What is Knowly AI?

Knowly AI is an advanced AI platform that empowers businesses, startups, and enterprises with reliable AI agents that automate web browsing routines and integrate with internal knowledge bases. Founded by a team led by YT, Knowly learns user-specific browsing patterns to eliminate repetitive tasks, delivering curated information with precision. Unlike generic AI chatbots, it offers secure, scalable deployment options cloud, on-premises, or private cloud making it ideal for cybersecurity professionals, data analysts, and business strategists.

What is Goodnotes?

Goodnotes is an AI-powered note-taking app that feels like a digital journal bursting with possibilities. Goodnotes 6 lets you handwrite or type notes, annotate PDFs, and convert handwriting to text with spellcheck and math assistance. It offers customizable pens, templates, stickers, and unlimited folders for organization. Search handwritten notes, collaborate in real-time, and present with a laser pointer. Sync across iOS, Android, Windows, and Web, export as PDFs, and use fun tools like lasso and shape recognition. It is perfect for students, professionals managing meetings, or creative journaling.

Spellar AI
  • No ratings found!
Otter.AI
(4.8/5)
  • Accuracy and Reliability:
    4.8
  • Cost-Efficiency:
    5
  • Customization and Flexibility:
    4.9
  • Data Privacy and Security:
    4.7
  • Ease of Use:
    4.5
  • Functionality and Features:
    4.8
  • Integration Capabilities:
    4.7
  • Performance and Speed:
    4.5
  • Support and Resources:
    4.9
Knowly AI
  • No ratings found!
Goodnotes
(4.3/5)
  • Accuracy and Reliability:
    4
  • Cost-Efficiency:
    4.5
  • Customization and Flexibility:
    4.5
  • Data Privacy and Security:
    4
  • Ease of Use:
    4.5
  • Functionality and Features:
    5
  • Integration Capabilities:
    4
  • Performance and Speed:
    4
  • Support and Resources:
    4
Spellar AI
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Otter.AI
No ratings yet.
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Knowly AI
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Goodnotes
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Goodnotes

Pros

Intuitive handwriting experience feels like real paper.

Robust sync across multiple platforms.

Strong privacy with on-device processing.

The free tier offers solid starting features.

Extensive template marketplace.

Cons

Android version lags behind iOS in performance.

Subscription is required for unlimited notebooks.

The typing interface can feel clunky.

Occasional sync issues were reported.

If you're looking for other Email Writing Tool tools for sales professionals, content creators, you can also explore GravityWrite, Type AI, AI Summarizer, which are highly rated in 2025.

Spellar AI
  • Not Data Available!
Otter.AI
  • Otter
  • Mountain View, California
Knowly AI
  • Not Data Available!
Goodnotes
  • Not Data Available!