How to Choose an AI Social Media Post Generator
An AI social media post generator turns an input, such as a prompt, a photo or your website address, into ready-to-post captions, images, carousels or videos. Dozens exist, and their demos all look good. The differences show up after the first few weeks: whether the posts still sound like you, whether the products look right and whether the tool fits how you actually work.
This guide gives you seven questions to ask before you pay, a scoring table you can reuse and a short comparison of three tools that learn your brand from your website. We make one of them, Marka, so we have kept the comparison to facts you can check on each vendor's site.
Key Takeaways
- Judge generators on brand learning first: a profile built from your own pages gives the tool your real products and wording.
- Check which formats each tool makes, especially carousels and short videos, which usually take longer to make by hand.
- Look for a clear approval step and the cost of each item before it is made.
- Compare plans by what you get (posts, credits, video, publishing), not the monthly price alone.
- Test before committing, with real posts from your own website: Pomelli is free, Marka has a 3-day trial and Holo lists no trial.
In this guide:
- What does an AI social media post generator do?
- Seven questions to ask before you choose
- A scoring table you can reuse
- Three tools that learn your brand from your website
- Rules to follow whichever tool you pick
- Frequently Asked Questions
- Make the decision with real posts
What does an AI social media post generator do?
At minimum, it writes captions and creates images. Better tools go further:
- Learn your brand from your website or files: products, voice, colours, fonts.
- Make several formats: single images, carousels and short videos.
- Fit each platform: sizes, caption lengths and hashtags.
- Plan and schedule: a calendar and connections to your accounts.
Some tools go further still and act like an agent: they plan content, ask for your approval and publish. Our explainer on what an AI marketing agent is covers that difference.
Seven questions to ask before you choose
1. Where does it learn about your brand?
A tool that only gets a short prompt will produce generic posts. Prefer tools that read your website or documents and build a profile you can edit. Our guide to turning your website into social media posts explains why that source matters.
2. Can you edit what it learned?
Look at the brand profile after setup. If the voice is off or a product is wrong, you need to fix it in one place rather than in every post.
3. Which formats does it make?
Single images are the baseline. Check carousels and short videos separately: they usually take longer to make by hand, so they are where a tool can save you the most time if it makes them well.
4. How accurate are product images?
AI image models can alter products. Google's help page for its Pomelli tool warns that AI can change fine details such as colours, logos or textures, and recommends reviewing every image before publishing (Google Labs Help). Test with your hardest product, not your simplest.
5. How do you approve posts?
Can you see every post before it goes out, request changes in plain words and approve quickly? Check where approval happens: a web dashboard, an app or a chat you already use.
6. Does it publish, or do you download?
Some tools only let you download assets and post them yourself. Others schedule and publish to connected accounts. Downloading is fine if you already use a scheduler; publishing saves a step if you do not.
7. How is it priced?
Pricing models vary: monthly plans with a number of "creations", credits that different formats use at different rates, or free tools with usage caps. Work out the cost of the posts you actually need each month, including video.
Example: a café wants 12 posts a month, four of them carousels and two short videos. List those 12 items, then check how each plan counts them. On Holo, ask how its 125 monthly creations are counted for videos and carousels. On Marka, each item shows its credit price before you approve it, so Marka's 3-day trial, with 180 credits, shows what your mix costs.
A scoring table you can reuse
Score each tool from 1 to 5 on each row while you test it.
| Criterion | What a 5 looks like |
|---|---|
| Brand learning | Reads your website, builds an editable profile, gets the voice right |
| Accuracy | Products, prices and logos match reality |
| Formats | Images, carousels and short videos |
| Approval | Every item visible and editable before it goes out |
| Workflow fit | Works where you already work, without extra steps |
| Publishing | Schedules to your platforms, or exports cleanly to your scheduler |
| Cost clarity | You know the price of each item before it is made |
Three tools that learn your brand from your website
These three start from your website rather than a blank prompt. Facts and prices were checked on 1 November 2026; check each site for current details.
| Feature | Google Pomelli | Holo | Marka |
|---|---|---|---|
| Brand profile | Business DNA from your website | Brand DNA from your website | Brand DNA from your website |
| Makes | Campaign images and videos, brand books, websites | Ads, social posts, SEO articles, emails | Image posts, carousels, short videos |
| Getting posts out | Download and post yourself | Plans and publishes after you tap approve on your phone; autopilot on the Scale plan | Approve, then schedule to connected accounts |
| Where you work | Web app | Web app and phone approvals, with integrations | Dashboard and WhatsApp |
| Price | No charge, with usage caps | Starter $20.33 a month list price (shown at $8.13 with a discount), 125 creations | From $8 a month, 210 credits |
| Trial | Free to use | No trial listed on its pricing page | 3 days, 180 credits, card required |
Sources: Google Labs Help, Google's Pomelli announcement (May 2026), Holo's home page, Holo pricing and Marka pricing. Marka is our product.
In short: Pomelli is a strong free start if you are happy to download and post yourself. Holo covers more channels, including ads, email and SEO. Marka focuses on social formats and lets you ask, approve and schedule from WhatsApp. Our full comparisons cover Marka vs Holo and Pomelli alternatives.
Rules to follow whichever tool you pick
- Expect platform AI labels. Meta adds an "AI info" label to images it detects as made or edited with AI (TechCrunch, July 2024). Since September 2024 the label is less visible on AI-edited content than on fully AI-generated content (TechCrunch, September 2024).
- Never generate reviews. The U.S. Federal Trade Commission's rule, in force since 21 October 2024, bans fake reviews and testimonials, including AI-generated ones (Federal Register, August 2024).
- Check before posting. Read every caption and compare every product image with the real thing.
For how a generator fits into a weekly routine, see our guide to AI social media marketing for small business.
Frequently Asked Questions
What is the best AI social media post generator?
The best one is the one that gets your brand right with the least editing. Test two or three tools on the same real posts and score them with the table above. Pomelli is free and Marka has a 3-day trial; Holo lists no trial, so one paid period of its Starter plan is the way to test it; check the billing terms beside the discounted price. Keep the one you edit least.
Are free AI post generators good enough?
They can be. Free tools are a good way to test whether AI fits your workflow. Check usage caps, whether you can publish or only download, and whether the tool may change as an experiment.
Can an AI post generator create posts from my website URL?
Yes. Several tools read your website to learn your products, voice and visual style, then generate posts from that profile. Check the profile they build before you create anything.
Do I still need to check AI-generated posts?
Yes. AI can misread facts, invent details and alter how products look. A short check before each post protects your brand.
Make the decision with real posts
Shortlist two or three tools, give each the same brief from your own website and compare the drafts side by side. The tool whose first drafts need the fewest fixes is usually the right one.
About this guide: written by Shalev Amin, co-founder of Marka, with AI assistance, and checked against the linked sources. Our editorial rules: every fact links to the source we checked it against, checks are dated, pages are updated when products, prices or data change, and we say so whenever we compare our own product, Marka, with other tools. Last checked on 1 November 2026. Spotted an error? Contact us and we will correct it. More about Marka.
