Shareworthy - Instagram Caption Share Optimizer

Shareworthy - Instagram Caption Share Optimizer

Optimize your Instagram captions for shares and DM sends, the signals that actually drive reach in 2026, not likes.

Instagram's algorithm now prioritizes shares and DM sends over likes, but no existing tool helps creators optimize captions for these specific signals. Creators either waste money on $300-$800/month freelance caption specialists or write captions blindly optimized for outdated engagement metrics.

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The Business

$2.5-4B

Market Size

$49-$149

Pricing/mo

Global

Worldwide Potential

Customer

Solo Instagram creators and micro-agencies (1-5 people) earning $2K-$20K/month from Instagram-driven businesses who post 4-7 times per week and currently spend on freelance caption help or AI writing tools.

Pricing

Freemium SaaS with three tiers: Free (5 captions/month with basic share-scoring), Pro at $49/month (unlimited captions, voice training, SEO optimizer, batch mode), and Agency at $149/month (5 brand voices, team collaboration, competitor analysis, priority generation). Annual plans at 20% discount to improve retention.


$235K

Estimated Annual Revenue

1%30%

400 customers at $49-149/mo

10% market capture


Competitionmedium

Revenue Potential$$$

TypeSaaS

IndustryCreator Economy

Market Size$2.5-4B

Customers1,500-4,000

Pricing$49-149/mo

Features

1
Share-Score Caption GeneratorMVP

Generates 3-5 caption variants from a content brief or image description, each scored 0-100 on predicted shareability based on share-triggering psychological patterns (relatability, utility, identity signaling, controversy, humor).

2
Instagram SEO Keyword OptimizerMVP

Analyzes captions for search-discoverable keywords that align with Google/Bing indexing of Instagram captions and Instagram's native search, suggesting keyword insertions that feel natural.

3
Share Trigger AnalyzerMVP

Breaks down any existing caption into share-trigger categories (save-worthy tips, relatable humor, hot takes, identity badges) and shows which triggers are present or missing.

4
CTA Pattern LibraryMVP

Provides tested call-to-action templates specifically designed to prompt shares and DM sends rather than generic 'like and comment' CTAs.

5
Niche Voice TrainingMVP

Users paste 10-20 of their best-performing captions to train the AI on their voice, tone, and audience so generated captions match their brand.

6
Caption Calendar & Batch ModeMVP

Generate and schedule a week's worth of optimized captions in one session, exportable to clipboard or CSV for use in scheduling tools.

7
Performance Tracker (Manual Input)

Users manually log shares, saves, and DM sends from Instagram Insights for each caption to build a personal performance dataset that improves future recommendations.

8
Competitor Caption Analyzer

Paste a competitor's caption URL to analyze their share-trigger patterns, keyword strategy, and CTA approach with actionable improvement suggestions.

9
Hashtag & Alt-Text Optimizer

Suggests hashtags and alt-text optimized for discoverability that complement the share-optimized caption strategy.

10
Chrome Extension Quick Generator

Generate share-optimized captions directly from Instagram's web composer or scheduling tools without switching tabs.

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Tech Stack

apis

OpenAI GPT-5.3

Core caption generation engine with fine-tuned prompts for share-trigger optimization

Perplexity Sonar Pro

Real-time trending topic and keyword research for Instagram SEO suggestions

Stripe

Subscription billing for monthly/annual plans

backend

Next.js API Routes

Handle caption generation requests, user auth flows, and subscription management

Supabase Edge Functions

Background processing for batch caption generation and voice training model updates

hosting

Vercel

Fast global deployment with edge functions support for low-latency caption generation

database

Supabase

User accounts, saved captions, voice training data, performance tracking logs, and subscription state

frontend

5 Day Sprint UI

Component library built on shadcn/ui and Tailwind for rapid, polished UI development

Next.js 14

React framework for the web app with SSR for marketing pages and client-side interactivity for the caption editor

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