8 Best LinkedIn AI Tools in 2026: A Practical Comparison
Quick answer: The best LinkedIn AI tool depends on how you create content. Castifai ($10/mo) is best for turning videos into posts and infographics. Taplio ($39-149/mo) is best for lead generation. Supergrow ($19-159/mo) is best for agencies. See the full comparison below.
The LinkedIn AI tool market has matured significantly. In 2026, there are tools for every approach — from video-to-content generation to blank-page AI writing, from premium all-in-one platforms to focused budget-friendly options.
But with so many choices, picking the right tool depends on one question: how do you prefer to create content? This guide compares 8 of the most popular LinkedIn AI tools, with an honest look at what each does best and where it falls short.
Quick Comparison Table
| Tool | Best For | Starting Price | Free Tier | AI Infographics | Humanizer | Video Input |
|---|---|---|---|---|---|---|
| Castifai | Video-to-LinkedIn content | $10/mo | Yes (unlimited) | Yes (9 styles) | Yes (free) | Yes (6 sources) |
| Taplio | LinkedIn power users + leads | $39/mo | No | No | No | No |
| Supergrow | LinkedIn creators + agencies | $19/mo | No | No | No | Limited |
| AuthoredUp | Post formatting & editing | $19.95/mo | 14-day trial | No | No | No |
| SayWhat | Premium AI writing | $59.99/mo | Free trial | No | No | No |
| ContentIn | Budget AI writing | $12.50/mo | No | No | No | No |
| Castmagic | Podcast/video → 100+ assets | $23/mo (annual) | Limited | No | No | Yes |
| Quso.ai | Video clips + text content | $15/mo | 75 credits/mo | No | No | Yes |
1. Castifai — Best for Turning Videos Into LinkedIn Content
Price: Free (unlimited) / $10/mo Pro
Castifai takes a different approach from most LinkedIn tools. Instead of starting from a blank page, you paste a link to a video, podcast, or web article, and it generates a LinkedIn post, long-form article, summary, or AI infographic.
It's the only tool on this list that generates AI infographics from video content — in 9 visual styles from Modern to Blueprint to Comic. It's also the only one with a built-in Humanizer that automatically refines all generated content to sound natural, free for all users, in 8 languages. The "Your Voice" feature learns your writing style so output sounds like you wrote it.
Pricing is the simplest in the category: Free tier with unlimited content creation. Pro at $10/month includes everything — no credits, no tiers, no feature gating.
Limitations: No carousel creation yet (coming soon), no LinkedIn analytics or engagement tools, no lead generation features.
Best for: Professionals who watch podcasts, conference talks, and interviews and want to turn those into published LinkedIn content without starting from scratch.
2. Taplio — Best for LinkedIn Power Users Who Need Lead Generation
Price: $39-149/mo
Taplio is the premium option in the LinkedIn tool space, offering AI content creation, scheduling, deep analytics, carousel creation, a Chrome extension, and access to a database of 3+ million contacts on the Pro plan ($149/mo).
The lead database is unique in this category. If your LinkedIn strategy is tied directly to sales prospecting, Taplio is the only tool that combines content creation with lead discovery.
Limitations: The most expensive option. AI content is frequently described as generic and template-like, requiring significant manual editing. The credit system depletes quickly. The Starter plan ($39/mo) has no AI credits at all.
Best for: B2B salespeople and marketers who need LinkedIn lead generation alongside content tools, and who have budget for a premium platform.
3. Supergrow — Best for LinkedIn Creators on a Mid-Range Budget
Price: $19-159/mo
Supergrow offers AI content generation, custom voice training (from 10 sample posts), a carousel maker, Kanban content calendar, post scheduling, and engagement tools. Agency plans support multiple clients.
The carousel maker is one of the best in the category. Voice training from sample posts gives reasonable style matching. Agency features ($69-159/mo) make it practical for managing multiple LinkedIn accounts.
Limitations: Content quality often requires heavy manual editing. Analytics are less comprehensive than Taplio. LinkedIn-only — no blog, article, or infographic output. No free tier.
Best for: LinkedIn creators and agencies who want a mid-priced all-in-one tool with carousel creation and scheduling.
4. AuthoredUp — Best for Post Formatting and Editing
Price: $19.95/mo
AuthoredUp is a Chrome extension that enhances LinkedIn's native post editor with text formatting, multi-device previews, readability scores, 200+ hooks and CTAs, scheduling, and analytics.
Limitations: No AI content generation at all — you still write everything yourself. Chrome extension only (no mobile). Scheduling capped at 3 months. LinkedIn only.
Best for: Prolific writers who create their own content and want better formatting, preview, and analytics tools for LinkedIn.
5. SayWhat — Best for Premium AI-Powered LinkedIn Writing
Price: $59.99-149.99/mo ($47.99-119.99 annual)
SayWhat is a premium LinkedIn AI platform with a custom AI agent called "Collab" that learns your voice over time, claims 95% accuracy in style matching, and can research trending topics. Features include post brainstorming, drafting, comment inbox, lead discovery, and analytics.
Limitations: One of the most expensive tools for individual creators. Still starts from a blank page (no video input). No visual content generation.
Best for: Professionals with budget for a premium tool who want a sophisticated AI writing assistant that deeply learns their voice.
6. ContentIn — Best Budget LinkedIn AI Writer
Price: From $12.50/mo
ContentIn is a budget-friendly LinkedIn AI ghostwriter with scheduling, analytics, and 100+ viral templates. Its AI is trained exclusively on LinkedIn content rather than general text.
Limitations: LinkedIn-only, no video transcription, limited to URL input for repurposing, smaller user base.
Best for: Budget-conscious LinkedIn creators who want basic AI writing and scheduling at the lowest possible price.
7. Castmagic — Best for Podcasters and High-Volume Content Teams
Price: $23-179/mo (annual)
Castmagic is a content powerhouse that generates 100+ content assets from a single recording. Supports audio/video file uploads, YouTube, Zoom, RSS, and Google Drive. Magic Chat lets you interact with recordings like ChatGPT.
Limitations: Complex — requires prompt engineering to get good results. Minute-based pricing means costs scale with usage. No visual content, no infographics, no humanizer.
Best for: Podcasters, agencies, and content teams who process large volumes of audio/video and need dozens of content assets per recording.
8. Quso.ai — Best for Combined Video Clips and Text Content
Price: Free (75 credits) / $15-30/mo
Formerly Vidyo.ai, Quso.ai combines short-form video clipping with text content generation. Its Viddy 2.0 AI assistant lets you interact with video content and generate social posts, blog content, and video clips from the same source.
Limitations: Credit-based system can be restrictive. Non-English languages only on paid plans. Less LinkedIn-specific than dedicated tools.
Best for: Creators who want both short video clips and text content from the same source video.
How to Choose the Right Tool
- If you consume a lot of video content: Castifai is built for turning podcasts, talks, and interviews into LinkedIn posts and infographics.
- If you need lead generation alongside content: Taplio is the only option combining content creation with a contact database.
- If you run an agency managing multiple accounts: Supergrow's agency plans and Kanban calendar are purpose-built for this.
- If you already write your own content: AuthoredUp enhances LinkedIn's native editor without trying to replace your writing.
- If budget is your primary constraint: Castifai ($10/mo with unlimited free tier) or ContentIn ($12.50/mo) are the most affordable.
- If you're a podcaster processing audio: Castmagic handles audio file uploads and generates the widest variety of content assets.
Final Thoughts
There's no single "best" LinkedIn AI tool — the best one matches how you actually create content. The tool landscape has segmented clearly: video-first creation (Castifai, Castmagic), blank-page AI writing (Taplio, Supergrow, SayWhat, ContentIn), editing enhancement (AuthoredUp), and hybrid video+text (Quso.ai).
The biggest shift in 2026 is the move toward content-informed creation — starting from something you've already consumed rather than an empty editor. Whatever you choose, the key is consistency. The best LinkedIn tool is the one you'll actually use every week.
Frequently Asked Questions
What is the best LinkedIn AI tool in 2026?
It depends on your workflow. Castifai ($10/mo) is best for turning videos and podcasts into LinkedIn posts and infographics. Taplio ($39-149/mo) is best for lead generation alongside content. Supergrow ($19-159/mo) is best for agencies. AuthoredUp ($19.95/mo) is best for formatting. See the full comparison above.
Which LinkedIn AI tool is cheapest?
Castifai offers the most generous free tier (unlimited content creation, no time limit) and the lowest Pro price at $10/month. ContentIn starts at $12.50/month. Both are significantly cheaper than Taplio ($39/mo), Supergrow ($19/mo), or SayWhat ($59.99/mo).
Can AI tools create LinkedIn infographics?
Only Castifai generates AI infographics from video content, with 9 visual styles. No other LinkedIn AI tool — including Taplio, Supergrow, AuthoredUp, SayWhat, or Castmagic — offers automated infographic generation.
Do LinkedIn AI tools work with video content?
Castifai, Castmagic, and Quso.ai all support video input. Castifai supports 6 sources (YouTube, TikTok, Instagram, X, Facebook, web). Castmagic focuses on audio/video file uploads. Quso.ai combines video clipping with text generation. Taplio, Supergrow, AuthoredUp, SayWhat, and ContentIn do not support video input.
Is it worth paying for a LinkedIn AI tool?
If you post on LinkedIn regularly (2-3 times per week), a tool that saves you 20-30 minutes per post pays for itself quickly in time. Free tiers (like Castifai's) let you test before committing. The key is choosing a tool that matches how you actually create content.
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