Skip to content
Sidelong — Startup Profile
Startup

Sidelong

Turn everything you learn into writing worth reading

Writing & copywriting

Among 1,395 Writing & copywriting products tracked by Astracia.

Astracia Signal Score

Compare with similar →

Not enough public signals for a score yet. Missing signals are not a sign of weakness.

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.

Product

Human Write

Human Write rewrites AI-assisted drafts in your own voice.

SnapVee Studio

SnapVee Studio is an AI content workspace for creators that

Eloquenti

Professional proofreading, editing, and writing services: Technical writing, medical writing, grant writing, academic writing, scientific writing and editing, copywriting, content writing. 👉Visit www.eloquenti.com to le

Folian

Folian is a Writing OS. Draft novels, canon, research & use optional AI support

Rewordium: AI Grammar Checker

AI paraphraser and keyboard for rewriting and grammar

Grammar Checker

Catch grammar and style issues before you publish

Creator AI

Personalized All in one production suite for Youtubers

CipherWrite

Secure private diary and book writing software

Browse category →

Selected by category and available use-case details. A topic match does not establish equivalent features.

Product

Online Word Counter Free

Free Word Counter & Text Analyzer — No Sign-Up, 100% Private

ScriptGrain

AI-powered writing tool that matches your unique voice

AI Writing Tools

Enhancing Content Quality with AI Writing Tools

Studio by ApisDom

AI writing with real-time research and cited sources

Zahvox

Voice-to-writing platform

Sena Slowblog

a calm place to write

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.

Product

Superflow Rewrite

AI website QA and review platform

Gutenberg Hub

AI writing assistant for WordPress

Friday AI

AI writing assistant for content…

TextCortex AI

Multilingual 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 Taher

Emirati business executive

Sally Mills

Organiser of Brisbane SEO Beers, Aus

Hodan Nalayeh

Somali 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 Finer

Newsletter · Eli Finer

Book Publishing Brick By Brick

Newsletter · Jeffrey Yamaguchi

Going against the grain

Newsletter · 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 build

Joel 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 clock

Nathan 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 year

Justin 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 headline

Ajay 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 visibility

7,398 listed products

Social media & influencer marketing

1,514 listed products

Email & newsletter marketing

1,164 listed products

Content marketing & CMS

836 listed products

Advertising & campaign management

573 listed products

Reputation & review management

478 listed products

Conversion optimization

442 listed products

Affiliate & referral marketing

254 listed products