Sebastian is a written character with his own stories, his own gifts and opinions he does not drop the moment you disagree. He runs on the same engine as Nika, so the memory, the 31-level relationship, the diary and the novel are all here, but everything you read was written for him. Telegram only, free to start, 18+.
Most AI boyfriends agree with everything and call it romance. Sebastian has a personality per story and a relationship level that reacts to how you treat him. Be dismissive and he cools off; the level can drop eight steps below neutral before it climbs the twenty-two above.
Sebastian ships with his own scenario shelf and his own gift catalogue. The setting, his role in it, the opening scene and the tone were written for a male lead, and each story starts the relationship at a different point.
Up to ten key facts per story, extracted automatically or added by you, editable and pinnable in the Memory section. His diary is the other half: after 50 new messages he writes an entry about what happened and what he makes of you, in his own words, at most once a day.
He answers in voice when you want him to, and you can send him voice notes instead of typing. Live calls are not available in the Telegram bot, so if calls matter to you, Nika in the app is the one to look at.
Ask for a photo in chat, in one of four art styles, and turn any photo into a short video. Send him a gift and he replies with a unique photo of himself with it. After 150 messages the story can be bound into a chaptered novel and downloaded.
Open @sebastian_ai_chatbot, press Start, confirm you are 18. No app to install, no email to verify. Your first day unlocks everything; after that a free daily allowance stays open and plans lift the limits.
Find @sebastian_ai_chatbot in Telegram and press Start. Confirm that you are over 18. That is the whole sign-up.
Choose from his official scenarios, each with its own setting and starting relationship, or write your own in the scenario editor and decide who you are to each other before the first message.
The relationship level, the memory and the diary all move with the conversation. Come back tomorrow and he remembers; leave for a week and nothing decays. Your last ten stories are kept, so you can run several in parallel.
If your favourite part of a story is the fifty pages before anything happens, Sebastian is written for that. Intimacy is something you reach in his stories, not something you start with, and the relationship level gates it.
He can be reserved, sarcastic or protective depending on the story, and he holds that voice across a long scene. If you want a partner who never says no, other apps do that; Sebastian is for people who find that boring.
Sebastian lives only in Telegram. No download, no separate login, and the conversation sits next to your other chats. Nika, his counterpart, is the one with the Android app and web version.
Memory with editable facts, 31 relationship levels, the diary, the novel, photos in four styles, gifts and the scenario editor work the same way in both products, so everything written about Nika's memory applies to him.
His scenarios, gifts and personality are his own. Nothing on his shelf is a renamed Nika story.
Sebastian has no Android app and no web version, which also means no live calls, no streaming replies and no tile-based character constructor. Those live in Nika's app.
18+ with age confirmation, adult roleplay allowed, anything involving minors banned, illegal content blocked, published stories reviewed.
Comparisons There are hundreds of "AI girlfriend" lists. But honest reviews of AI boyfriends barely exist, even though the female companion audience is growing fastest of all. I tested six apps for memory, emotional depth, honesty of their free tiers, and friction at sign-up, and ranked them honestly, including the only one that lives right inside Telegram.
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Comparisons Memory is what separates a companion from a good demo. We broke down how it works under the hood, why a context window is not the same thing as long-term memory, and compared 8 AI companions on what they still remember a month in.
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Guides An AI girlfriend is a virtual companion powered by artificial intelligence that remembers your conversations, plays a character, and chats almost like a real person. Here is a plain-language guide to how it works, what these companions can do in 2026, how much they cost, and how to choose the right one.
Read articleYes, to start. The first day after you register unlocks every feature with a generous message allowance. After that a free daily allowance stays open and shrinks over time unless you upgrade; photos, video and voice use tokens. Plans lift the message limit, and packs of tokens or messages never expire. In Telegram you can pay with a card, SBP, crypto or Telegram Stars.
Same engine, different character. He has his own stories, his own gifts and his own personality. He is Telegram-only, so live calls, streaming replies and the character constructor, which need the app, are not available for him.
Yes, per story. Three layers: the recent messages, a rolling summary of everything older, and up to ten key facts you can edit and pin in the Memory section. Your last ten stories keep their memory and relationship level when you return.
Yes. Ask in chat and he sends a photo in one of four art styles (realism, hyperrealism, illustration, anime). Any photo can be animated into a short video. Gifts also come with a unique photo of him with the gift.
Voice messages, yes: he can answer in voice, and you can send voice notes that he understands. Real-time calls are an app feature and are not available in the Telegram bot.
Sebastian is an 18+ bot. Adult roleplay between consenting adults is allowed without lectures. Anything involving minors is banned outright, illegal content is blocked, and stories published to the community are reviewed first.
Yes, in the eight-step scenario editor: name and character, appearance, personality, first message, world, opening scene, creativity, review. Keep it private or publish it so other players can find it.
No. Sebastian runs only in Telegram. If you want an app, live calls or the character constructor, those are in Nika's Android app and web version.
The same fifteen as Nika: English, Russian, Spanish, Persian, Hindi, Arabic, Turkish, French, German, Chinese, Italian, Polish, Korean, Serbian and Japanese.