How it compares
Writing & copywriting market map →Among 1,395 Writing & copywriting products tracked by Astracia.
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About the startup
Sidelong is a writing platform for people who publish. Save the articles, books, videos, and podcasts that spark ideas, and Sidelong surfaces them beside your draft while you write. Ask it to research a topic and get a fully cited report in minutes. Then publish to Substack, Beehiiv, a free hosted blog, your newsletter, or straight to X and LinkedIn. Every word on the page is yours.
Alternatives to Sidelong
Browse category →Reviewed matches are labeled. Other suggestions come from a shared subcategory, use case, source listing or the same category. Compare features and current plans before choosing.
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FolianFolian is a Writing OS. Draft novels, canon, research & use optional AI support |
Rewordium: AI Grammar CheckerAI paraphraser and keyboard for rewriting and grammar |
Grammar CheckerCatch grammar and style issues before you publish |
Creator AIPersonalized All in one production suite for Youtubers |
CipherWriteSecure private diary and book writing software |
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Recently added in Writing & copywriting
Browse category →Added to this directory in the past 30 days. Dates refer to the directory listing, not the product launch.
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Superflow RewriteAI website QA and review platform |
Gutenberg HubAI writing assistant for WordPress |
Friday AIAI writing assistant for content… |
TextCortex AIMultilingual writing assistant |
Explore expertise in Marketing & Content
See all →Profiles grouped by topic. This does not confirm an offer, availability or a connection to this profile.
| Profile |
|---|
Amina TaherEmirati business executive |
Sally MillsOrganiser of Brisbane SEO Beers, Aus |
Hodan NalayehSomali media executive, marketing consultant, activist, entrepreneur |
Media about Marketing & Content
See all →Shows and channels grouped by topic. A recommendation does not mean this profile was featured or endorsed.
| Show |
|---|
Eli FinerNewsletter · Eli Finer |
Book Publishing Brick By BrickNewsletter · Jeffrey Yamaguchi |
Going against the grainNewsletter · David Iwanow |
Founder stories from Marketing & Content startups
See all →Retold founder accounts from startups in the same category, each linked to the original.
| Story |
|---|
Buffer's first paying customer arrived four days after a seven-week buildJoel Gascoigne validated Buffer with a two-page landing flow, spent seven weeks of evenings and weekends on a minimal product, launched on 30 November 2010, and recorded a first paying customer within four days. |
ConvertKit's $5,020 MRR in 2015 is not the 2020 ARR clockNathan Barry's March 2015 essay records ConvertKit at $5,020 monthly recurring revenue after 26 months and $55k invested; a later year-in-review he wrote for 2020 states ARR grew from $19.83 million to $25.85 million, a |
Justin Duke’s 2021 review peaked at $10,105 MRR, not a $392k yearJustin Duke’s 25 December 2021 year-in-review states Buttondown peaked at $10,105 MRR, ended the year south of that peak, and logged 23 million emails sent. He did not state $392,000 for the year in that post. The angle |
Ajay Goel priced GMass after a free year, not after an ARR headlineAjay Goel’s own GMass posts give send volume, user counts, and plan prices. In a later interview he described a $10,000 first build, a free first year, and $10,000 to $20,000 a month after the paywall. He did not state $ |
Browse Marketing & Content categories
See all →Subcategories in the same part of the directory, with the number of listed products.
| Category |
|---|
SEO & search visibility7,398 listed products |
Social media & influencer marketing1,514 listed products |
Email & newsletter marketing1,164 listed products |
Content marketing & CMS836 listed products |
Advertising & campaign management573 listed products |
Reputation & review management478 listed products |
Conversion optimization442 listed products |
Affiliate & referral marketing254 listed products |



