Writing assistant for summarizing information

Sidelong is a free AI writing assistant that supports writers throughout the entire process of writing. It doesn’t write articles for you, but it focuses on helping you research, develop ideas, and refine your work. It summarizes saved materials and pulls out key information, which is useful when you're working with multiple sources. 

Sidelong allows you to save articles, books, YouTube videos, podcasts, tweets, newsletters, and PDFs, and then access the relevant information while you are working on a draft. It’s basically built to keep your research on the sidelines so you can stay focused while writing, especially when you're working on research-heavy articles.

Save time in going through old notes

Sidelong includes an editor that keeps your research close while you write. Important information can be displayed alongside your draft, reducing the need to search through old notes. All findings can be turned into cited reports and saved to your library, giving you another resource to work from when developing an article or newsletter. However, for casual writers who only write occasionally, its research and publishing ecosystem may feel unnecessary. 

Its Ask Sidelong feature can answer questions, brainstorm ideas, explore topics, and give feedback on your writing. What sets it apart from a typical chatbot is that it’s connected to your research library. For writers who pay attention to where their information comes from, this can be a big advantage. It makes the AI feel more like a helpful research assistant rather than just a tool that automatically generates content.

The platform comes with tools for publishing and sharing your work. It offers options to host your content and manage your subscribers. You can also export your work in formats like Markdown and HTML. Additionally, it supports publishing workflows with platforms like Substack and Beehiiv, and there are social media tools that help turn your longer articles into promotional posts for sites like X and LinkedIn.

Perfect for writing research-heavy material

Overall, Sidelong takes a different approach to AI writing by focusing more on enhancing the whole writing process rather than just replacing the writer. Its research library, AI assistant, writing space, and publishing tools all work together for content creators. However, it’s not the best option if you're looking for quick, AI-generated articles. It’s more useful for writers who do a lot of extensive research.

  • Pros

    • Write alongside summarized information
    • Personal library with a wide range of sources
    • Ask Sidelong feature for deep brainstorming
    • Includes tools for publishing and sharing your work
  • Cons

    • Overwhelming for casual writers
 0/5

App specs

  • Developer

  • License

    Free

  • Version

    1.0

  • Latest update

  • Platform

    Web Apps

  • OS

    Safari

  • Language

    English

Program available in other languages



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Laws concerning the use of this software vary from country to country. We do not encourage or condone the use of this program if it is in violation of these laws.
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Is Sidelong safe?

100/100

Score result: Clean

This file passed a comprehensive security scan using VirusTotal technology. It is safe to download.

  • Virus free
  • Spyware free
  • Malware free
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Scan Info

Last scan
Tuesday, September 8, 2026
Scan provider
VirusTotal

Softonic security commitment

Sidelong has been thoroughly scanned by our advanced security systems and verified by industry-leading partners. This file comes from the official developer and has passed all our security checks, showing no signs of viruses, malware, or spyware. For more information, visit our Security and Trust Center

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