Best SoulGen Alternative: A Companion First, With Pictures and Video

SoulGen started as one of the best known AI image generators for realistic and anime "AI girls", and it has grown into a broader creative studio. It is operated by Synapse AI Limited, a company incorporated in Hong Kong, and its terms are governed by Hong Kong law. Today its homepage leads with an all-in-one AI video generator: you turn images or text into HD videos with motion, sound and talking characters with lip-sync. Next to that sit AI character images in realistic and anime styles, prompt-based image editing, outpainting, and Soul Chat, where you talk with AI characters it calls soulmates.

Nastia comes at the same desire from the other side. It is companion first. You design one AI girlfriend or boyfriend, chat with them uncensored, hear them in voice messages, and get pictures and short videos of that same companion as your story goes. The pictures follow the relationship, not the other way round. Nastia is strictly for adults 18+. This page compares the two honestly, including the places where SoulGen is the stronger tool. If explicit roleplay is what you are after, our guide to NSFW AI chat explains how Nastia handles it.

If you think in pictures and clips, SoulGen gives you a lot of tools in one place. Its video generator has five modes: image to video, reference to video, video extend, video edit and text to video. You can pick between models, render at 720p or 1080p on its SoulOmni models, and switch sound effects on or off. Talking characters with lip-sync are a genuine highlight that most companion apps, Nastia included, do not offer.

On the image side, SoulGen creates characters in several looks, from realistic to anime, with a choice of style models and aspect ratios. Smart Edit adds, removes or changes elements of a picture with a simple text prompt, and the image extender expands a picture beyond its borders. If you enjoy directing every frame and trying many different characters, that is a big toolbox.

Soul Chat adds conversation. There is a long list of ready-made soulmates with their own backstories, you can create your own soulmate with a custom look and personality, ask for images in chat, and even start a voice call. Live voice calls are something Nastia does not have.

Some of its policies are reassuring too. SoulGen's terms say your generated content will not be used for advertising or model training, and its privacy policy says creations you do not post to its community are deleted from its servers after 7 days. You can delete your account from the app.

SoulGen invites you to try it free, but its pricing page does not spell out a free allowance. What it does show is that almost everything runs on credits, so how far you get depends on what you make.

Nastia's free plan is built around a companion you make yourself. You get one companion you design, uncensored chat every day with daily limits, and no credit card is needed. It is not a trial that runs out, so you can take your time getting to know your companion before you decide whether to upgrade.

SoulGen's pricing page lists a single paid plan, Pro. One month costs $12.99 and is labelled "No recurring fees"; the 12 month option has a list price of $155.88. Pro unlocks all features, gives you 100 credits each month (1,200 for the year), removes blur, and adds a priority queue and multitasking. When we checked, the page also showed a first purchase discount on the yearly option; we only quote the regular prices here.

Credits are what you actually spend. On the same page, a text message in Soul Chat costs 0.2 credits, an image in chat 2 credits, a voice call 1 credit per minute, and creating a soulmate 10 credits. A character image costs 1 credit, and video starts at 15 credits per 5 seconds on the SoulGen 3.0 model, with 2 more for sound, rising to 30 to 40 credits per 5 seconds for 1080p on the SoulOmni models. Put simply, 100 monthly credits cover about 500 chat messages, or about six 5 second clips on the base video model, but not both.

Refunds are narrow. SoulGen's return policy offers a refund of your latest subscription payment within 14 days only if you have not used any credits or created any images since paying, and sale items cannot be refunded.

Nastia has three plans: Free, Standard at $11.99 a month and Unlimited at $15.99 a month. Unlimited gives you unlimited chat messages, so you never count messages. Pictures and short videos come with Standard and Unlimited through a daily token allowance that refills every day, rather than one monthly pool you can run dry in an evening.

SoulGen treats images and video as the main event. You can make anything you can describe, in many styles, for any character, then animate it, extend it, edit it or give it a voice. That is ideal if you enjoy prompt craft and want a different scene, style or character every time.

Nastia treats pictures as part of the relationship. On Standard and Unlimited you ask your companion for a picture at any point in the conversation, and you get the companion you designed, in the moment you are talking about. You can then turn images you generate into short videos. There are fewer knobs than in SoulGen's studio, but you do not need to write prompts or keep a character consistent yourself: it is the same person every time.

That difference shows up in everyday use. On SoulGen, a good result often starts with a well written prompt, the right style model and a few tries before you animate it. On Nastia, you might be chatting about a lazy Sunday, ask what your companion is up to, and get a picture that fits the conversation you are already having. One approach suits people who like to direct every detail; the other suits people who would rather stay in the story and let the companion they built show up in it.

Nastia does not accept photo uploads at all, and it never creates content of real people. Everything is fiction between consenting adults.

This is the biggest practical difference for many people searching for SoulGen. Its current terms of service list pornographic, obscene and lewd content among the things you may not upload, share or transmit through the service, and its pricing page lists "Remove blur" as a Pro benefit without saying which results get blurred. SoulGen today presents itself as a general creative studio rather than an adult app.

Nastia is built for adults from the start. Uncensored chat is available on every plan, including free, and pictures and short videos come on Standard and Unlimited. The limits are simple and firm: adults 18+ only, no minors in any form, and no real people.

Soul Chat is a feature inside SoulGen, priced per message. Each text costs 0.2 credits, so long evenings of chatting draw down the same credits you use for images and video. Its public pages do not describe a long-term memory feature.

On Nastia, chat is the core of the product. Long-term memory comes with the paid plans, so your companion recalls names, preferences and the storylines you share across sessions. You can download your chat history any time. On Unlimited you can bring up to five of your companions into one group chat.

Voice is where SoulGen is ahead. It offers voice calls in chat at 1 credit per minute. Nastia has voice messages only: your companion sends them in the voice you chose, and there are no voice calls. If talking out loud in real time matters most to you, SoulGen has the edge here.

SoulGen is built for variety: dozens of ready-made soulmates, many image styles, and the option to create a soulmate of your own for 10 credits. If you like switching between characters and looks, that is a genuine advantage.

Nastia is built around a relationship. You design your companion's appearance, personality, backstory and voice, then simply talk. You can start with an AI girlfriend or an AI boyfriend in the same app, and the free plan already includes your own companion.

Pick SoulGen if you mainly want an AI image and video studio with several video modes, 1080p output, sound and lip-synced talking characters, if you want live voice calls in chat, or if you like browsing many ready-made characters and paying a low monthly price for credits.

Pick Nastia if you want a companion first: one AI girlfriend or boyfriend you design on the free plan, uncensored chat every day, long-term memory on paid plans, pictures and short videos of that same companion from a daily allowance on Standard, unlimited messages on Unlimited, group chats with up to five companions, and chat history download.

Still comparing? Our Promptchan alternative page covers another image and video studio with chat, and our Candy AI alternative page looks at a picture-led companion app.

Moving over takes a couple of minutes. Create your free account, choose your companion's look, personality, backstory and voice, and start chatting. If you had a soulmate you loved on SoulGen, describe a similar look and personality when you create your companion , then tell them the story so far in your first messages.

The free plan lets you try uncensored chat before paying anything. When you want long-term memory, pictures and video, upgrade to Standard or Unlimited. Start with Nastia for free .