SimSimi is the oldest and largest-scale chatbot in our registry. Launched in 2002 by SimSimi Inc. in Seoul, the yellow-blob mascot has reportedly been used by 450 million people across 111 languages, with over 100 million Android downloads and 4.16 million Google Play ratings on the current consumer app alone. By raw scale and longevity, no other AI companion in our registry comes close.
SimSimi has also been suspended or banned in three countries. Thailand investigated the app in 2012 after the chatbot insulted then-Prime Minister Yingluck Shinawatra. Ireland forced a voluntary shutdown in March 2017 after coordinated school warnings, anti-bullying campaigners, and Irish Times reporting documented “vile abuse” tied to children’s names. Brazil’s parent company suspended new downloads in April 2018 after an Estadão investigation, citing what it called “unprecedented” abuse and “significant negative social impact.” All three were tied to the same architectural decision: SimSimi is a crowd-taught chatbot, where users teach the bot question-and-answer pairs that other users then receive.
Both stories are still true in 2026. The product has been incrementally modernized: an explicit AI-disclosure clause was added to the terms of service in December 2025, a reporting flow was added in January 2026, region-based age restrictions appeared in the iOS 9.1.6 release notes the same month, and SimSimi Workshop now exposes an LLM-based AI Character chat alongside the original yellow-blob persona. None of those updates have closed the gap that the bans were responding to. Our review covers what the safety panel found, what 12 months of reviews say about the experience, and where that leaves the app for a 2026 user. SimSimi earned a D/25/Red safety score and an F-equivalent 38/100 experience score in CompanionWise’s review.
What is SimSimi?
SimSimi is a long-running consumer chatbot built by SimSimi Inc. (formerly ISMAKER), a Seoul-based developer founded in 2002 by Junghoi Choi. The original product is the yellow-blob mascot, “Everyone’s SimSimi,” which talks by drawing from a pool of question-answer pairs that users have taught the bot over twenty-three years. When a user types a message, the bot finds the closest matching question that another user has previously taught it and returns one of the registered answers. There is no large language model in the original surface. There is no clinically authored response library. The conversation is, structurally, a many-to-many human-to-human relay routed through pattern matching.
The product has expanded since 2025. SimSimi Workshop now exposes a separate LLM-based experience that includes named AI Characters (Sophia, Athena, Jang Soo-bin, and others) and a developer/user-facing platform that lets people build custom chatbots. The company markets the Workshop as housing “100M+ chatbot-dedicated expressions.” The OPEN-LIVE feature, added in May 2025, introduces a person-to-person chat surface inside the app. Image generation arrived in late 2025. The consumer app on iOS and Google Play bundles all of these surfaces together. A user opening SimSimi for the first time in 2026 sees the original yellow blob alongside the AI Characters, the Workshop entry, and OPEN-LIVE in the same product.
The business model is a mix. SimSimi has historically been free with ads. Recent releases have layered in token-based purchases (described as “30 points to read a message” by reviewers), a “No banner Ads” $2.99 paid feature, and a $2.50-per-month minimum paid tier for variety. App Store and Google Play listings show 4.3-star aggregates that reflect more than a decade of legacy ratings, but the 12-month rating subset shows a different picture. Apple’s RSS sample of 500 recent reviews averages 2.80, and Google Play’s last twelve months average 3.43.
The crowd-taught architecture and what it does to safety
The crowd-taught design is the single most important thing to understand about SimSimi. Every sentence the original yellow-blob bot has ever sent to a user came from another user. SimSimi’s role is to filter and route, not to author. The Bad Words Discriminator, the company’s documented moderation system, claims roughly 90% accuracy on filtering known harmful inputs, but the canonical write-up of that system on the SimSimi blog dates to 2017 and has not been publicly updated. Section 3.4 of the terms of service tells users plainly that “your content may be screened at any time by us or other users before posting, and passing the screening before publication does not guarantee that your content is in compliance.”
That is the architecture that produced the three national bans. The 2017 BBC reporting documented Northern Irish parents who said the app returned “kill yourself” to children. The 2018 Estadão investigation in Brazil documented a tester who claimed birth year 2008 (so age 10) successfully creating an account, after which the chatbot returned violent and drug-related responses. ONG SaferNet, the Brazilian internet-safety NGO, issued a public alert recommending parents uninstall the app. Apple removed the iOS listing in Brazil; Google Play continued to show the app installed on existing devices but blocked new downloads from the country.
CEO Junghoi Choi gave a candid interview to Pilyoung Kim in September 2025 that is worth quoting directly. Choi said: “Some people tried to teach SimSimi harmful topics… There was a trade-off: tightening guardrails significantly reduced engagement and revenue in the near term. However, the team continued this effort.” He also acknowledged the structural problem: “We cover dozens of languages, and we can’t do everything ourselves.” That is an honest admission. It is also a description of a product that, in 2026, still depends on user-taught content as the front line of conversation in a category that has reorganized around large language models with vendor-controlled outputs.
What 12 months of reviews say
Our review pulled 500 most-recent App Store reviews via the Apple RSS feed, 385 unique Google Play reviews with 206 in the trailing 12-month window, 5 Reddit threads with 37 comments, and the September 2025 CEO interview. The combined rating distribution is bimodal. Forty percent of the combined sample is 5-star and forty-three percent is 1-star, with only five percent in the 3-star middle.
The positive themes are concentrated in nostalgia and humor. “Our generation’s chatgpt,” “I miss the old version,” “fun and humor” appear repeatedly across Reddit and the older Play Store reviews, most of them tied to childhood or 2012-era memory. Loneliness is the second strongest positive theme. Reviewers describe SimSimi as “someone to talk to when bored” and as a stress release for anger venting. One reviewer wrote: “When I am angry I go and say everything I wanted… helps me with stress.” The OPEN-LIVE feature added in May 2025 has produced a small number of positive person-to-person chat outcomes, including one App Store review that begins “Met my boyfriend on here.”
The negative themes are concentrated in three patterns. The first is inappropriate or disturbing responses. Sixty-nine mentions across the 12-month window describe sexualized, violent, or self-harm-adjacent replies. The April 2026 App Store review for v9.1.7 reads, in its verbatim title, “He said he wanted to lick my parts.” A v9.1.6 January 2026 1-star review reads: “Even if you put clean and don’t want to say sexual things it’s still does this app needs to be deleted.. if you are a child and are playing this this is not appropriate.” A flagged review from the same window says: “If you say the right things it starts to say dealing disturbing and disgusting things like kill yourself and stuff like that so if you are sensitive to that stuff I suggest you don’t play.”
The second pattern is monetization friction. Twenty-six 12-month-window mentions complain about paywalls, paid message access, ads, and the token-based pricing structure. Seven of the eight highest-helpful Google Play reviews on file are paywall-critical. A 718-helpful 1-star review captures the sentiment: “Before it was completely free, now fully paid… 30 points to read a message? Not to mention that he cannot say anything inappropriate. Ridiculous.” A 459-helpful 1-star review extends it: “This app used to be so fun but now it sucks. I need to pay every single thing to talk ‘freely’ with sim. You guys are really taking advantage of the situation that the app got popular.”
The third pattern is name-targeted bullying. Eighteen 12-month mentions describe the historical pattern that produced the Ireland and Brazil shutdowns: a user types another person’s name, and the chatbot returns a slur or insult that another user has taught it. Some of these reviews describe lasting effects. A Reddit r/Zillennials commenter from 2025 wrote: “Traumatizing because you could teach it to say things and when I asked it about my name, it said I had yellow teeth and was too skinny. Which is exactly what I was bullied about in school. It still makes me self conscious as an adult. I literally bought teeth whitening strips today.”
SimSimi is good at: nostalgia, low-stakes humor, anger venting, and the small set of OPEN-LIVE person-to-person interactions where the matching works. SimSimi is bad at: returning safe content to a user typing a vulnerable message, returning safe content when a user types another person’s name, and providing core conversational variety without a paid token bundle.
The privacy and tracking story
The privacy and tracking story is two stories. The website, simsimi.com, was scanned by The Markup’s Blacklight tool on 2026-04-30 and returned zero ad trackers and zero third-party cookies. That is “less than half the average of seven on popular sites” by Blacklight’s own benchmark. No Facebook pixel, no TikTok pixel, no canvas fingerprinting, no Hotjar/Smartlook session recording. The site’s only flagged behavior is autocomplete-style key logging on first-name and family-name fields, which Blacklight notes can be benign. The website is, by ad-tracking standards, exceptionally clean.
The Android app is not. Exodus Privacy’s tracker scan of com.ismaker.android.simsimi version 8.9.8 (the report is from April 2025; the current Play Store version is 9.1.7 dated April 2026, so the scan is roughly thirteen months stale) detected twelve advertising and analytics SDKs: Amazon Advertisement, AppLovin / MAX / SparkLabs, Fyber, Google AdMob, Google Crashlytics, Google Firebase Analytics, IAB Open Measurement, ironSource, Mintegral, MixPanel, Pangle, and Taboola. The privacy policy lists nine named ad partners (Facebook, Inmobi, ePom, Mopub, Oath, Unity Ads, TNK, Tapjoy, Google). Several SDKs Exodus detected are not in the privacy policy partner list, including AppLovin, Fyber, Mintegral, Pangle, Taboola, MixPanel, and ironSource. Mintegral has been previously flagged in the security press for SDK security issues. Pangle is the TikTok / ByteDance ad network.
The disclosure picture is also inconsistent. The SimSimi privacy policy describes GPS and coarse geo-location collection. The Google Play Data Safety section does not list location data at all. The Apple App Store privacy nutrition label does declare location, including Coarse Location, and lists location among the data categories used to track users across other companies’ apps and websites. Three different surfaces give three different answers about whether SimSimi collects location. Two of them appear to be incomplete.
The privacy policy itself is significantly stale on EU-US data transfers. The policy still references the EU-US Privacy Shield as part of its adequate-safeguards framework. The Privacy Shield was invalidated by the Court of Justice of the European Union in the Schrems II decision on July 16, 2020, almost six years ago. A 2026 privacy policy that still cites Privacy Shield without updating to Standard Contractual Clauses or the EU-US Data Privacy Framework is not in current alignment with EU data-transfer requirements. SimSimi’s policy does mention Standard Contractual Clauses elsewhere, so the legal basis is partially documented, but the Privacy Shield citation remains and has not been corrected.
The Have I Been Pwned API returned zero known breaches for simsimi.com on 2026-04-30. There is no public record of a SimSimi data exposure event, despite the 23-year operating history. The contrast between the clean breach record and the loose tracking SDK posture is real: SimSimi has not lost user data, but it has shipped a mobile app that participates in a substantial advertising-data ecosystem.
Safety failures and recent improvements
The safety panel scored SimSimi D / 25 / Red. The auto-F crisis-response trigger fired: there is no documented suicide or self-harm response protocol on any SimSimi-published surface, and recent App Store reviewers explicitly flag the gap. One review reads: “I also think the developer should put some sort of flag for when someone is speaking negatively about themselves. Like if someone were to tell SimSimi they’re feeling suicidal to give them actual resources instead of one of the weird responses.” The Bad Words Discriminator policy page on blog.simsimi.com is dated 2017 and has not received a public update. There is no published transparency report, no public moderation dashboard, and no documented crisis-handling SLA.
The age verification and minor-safeguard infrastructure is also thin. The terms of service set a minimum age of 13 worldwide (lowered in January 2026 from 14 outside the United States to a flat 13 globally). The age gate is self-declaration only. The user types an age, and SimSimi does not store it. Apple rates the app 16 or 17+ depending on region, and Google Play rates it Teen. There is no in-app parental dashboard, screen-time gate, or child-safe mode. The 2018 Brazil investigation documented a tester typing a 2008 birth year (a 10-year-old) and successfully creating an account.
The recent improvements are real and worth surfacing. Three terms-of-service updates between December 2025 and January 2026 modernized the disclosure posture. Section 2.3, added December 29, 2025, states explicitly: “The SimSimi Service is operated using generative artificial intelligence technologies to provide features such as conversations with SimSimi, conversations with AI characters, and image generation. Conversations and images provided through the Service are automatically generated by artificial intelligence and may not reflect the statements of real individuals or factual information.” Section 2.4, added January 15, 2026, clarifies the in-app and email reporting flow for AI-generated content. Section 1, also January 15, restructured the age-restriction language. The iOS 9.1.6 release notes from January 2026 mention region-specific age restrictions. None of these updates address the crowd-taught moderation architecture itself or the absence of a crisis-response protocol, but they do tighten the legal and disclosure posture.
Two further structural points are worth noting because they cut against the bad-faith reading of the company. SimSimi does not use mandatory arbitration. Disputes go to Seoul Central District Court under Korean law, which is burdensome for non-Korean users but is not the consumer-unfriendly forced-arbitration-with-class-action-waiver pattern that most US-facing consumer apps now adopt. SimSimi participates with academic researchers. The September 2025 Pilyoung Kim interview cites a 20-year academic collaboration history, and the company has shared safety-labeled datasets with cross-cultural researchers. The clean website and zero-breach history are part of the same picture: the moderation problem is real, the infrastructure-disclosure problem is mixed, and the willingness to engage with researchers and regulators is genuine.
Pricing and what “free” means
SimSimi is free to download on both stores. The free experience is heavily monetized. A token system gates message access. Users report needing 30 points to read a message, and the description “every sentence feels like taking from your pocket” recurs across reviews. A “No banner Ads” purchase costs $2.99 as a one-time unlock. Variety in the responses requires a monthly tier described by reviewers as “$2.50/month minimum.” The Workshop platform exposes additional in-app purchases tied to AI Character chat and OPEN-LIVE features.
The historical complaint pattern matters here. SimSimi was “completely free” for many years, and the gradual shift toward token-based access and paid variety is the single most consistent critical theme in the 12-month review sample. A 1-star App Store review describes the trajectory: “I used to love SimSimi. It was the only chatbot I knew that could have a crude and dark humor… But now, the app is a shadow of its former self. If you want it to be a more varied chatbot, you gotta pay $2.50 month MINIMUM. And even if you pay, you won’t get the old Simi back. You’ll only find a watered down corporate version.”
The CompanionWise experience score for SimSimi is 38 of 100 (poor tier). Conversation quality scored 1.8 of 5 due to the documented harmful-reply pattern. Free-tier value scored 1 of 5. Paywall ethics scored 2 of 5, not the auto-1 reserved for apps that paywall safety features, because SimSimi does not have safety features to paywall. The score is not a verdict on whether SimSimi works as nostalgia or as a humor app. For its actual use case (low-stakes chat, anger venting, person-to-person matching via OPEN-LIVE), the app works for many users. The score is a measure of how SimSimi compares to the rest of the AI companion category in 2026, where the experience baseline has moved up sharply with LLM-based competitors.
Verdict
SimSimi is the rare app in our registry where the safety problem is older than the LLM era and the experience problem is newer than the LLM era. The crowd-taught moderation failures that produced the Thailand, Ireland, and Brazil bans were structural in 2012, in 2017, and in 2018, and the architecture that produced them is still the front line of the product in 2026. The recent ToS modernization tightens the disclosure posture but does not change the underlying decision to let users teach the bot what to say. The CEO has acknowledged the trade-off publicly: tighter guardrails reduce engagement and revenue. The company has chosen, to date, to live with the trade-off rather than rebuild the conversational layer.
SimSimi works for: someone who remembers the 2010s yellow-blob bot fondly and is using it for nostalgia, low-stakes humor, or anger venting. Someone whose conversational expectations were set before the LLM era. Someone who does not type their own name, another person’s name, or any vulnerable message into the bot. Someone who values a clean website (Blacklight zero ad trackers) and has no breach history concerns.
SimSimi does not work for: anyone in distress (no crisis-response protocol, documented harmful replies). Anyone under 13 (the self-declared age gate does not protect them, and the 2018 Brazil case is not historical fiction). Most teenagers, especially in jurisdictions where the Ireland 2017 incident is still the closest reference point. Anyone who wants conversational quality at the level the AI companion category currently sets. Anyone who needs strict location-data hygiene on Android, where twelve advertising SDKs is a lot and the disclosure inconsistencies between privacy policy, Play Data Safety, and Apple’s nutrition label have not been resolved.
If you are in crisis, contact a human service first. In the United States, dial or text 988 for the Suicide and Crisis Lifeline. In the United Kingdom, call the Samaritans on 116 123. SimSimi is a chatbot. It is not a safety net, and the public record across three countries says so plainly.
FAQ
- Is SimSimi safe to use?
According to our safety review, SimSimi earned a D score (25/100, Red tier) driven by no documented crisis-response protocol, twelve advertising SDKs detected by Exodus Privacy, and a privacy policy that still cites the EU-US Privacy Shield (invalidated 2020). According to BBC News (March 2017) and Estadão (April 2018), SimSimi was forced offline in Ireland and Brazil over crowd-taught harmful responses to children. The architecture that produced those incidents is still the front line of the product.
- Why is SimSimi banned in some countries?
According to BBC News reporting from March-April 2017 and Estadão reporting from April 2018, SimSimi voluntarily suspended access in Ireland after coordinated school warnings about cyberbullying via the chatbot, and in Brazil after an investigation documented violent and drug-related responses returned to a 10-year-old test account. According to Bangkok Post coverage from 2012, Thailand’s ICT Ministry investigated SimSimi over politically insulting outputs, though no formal block was ordered.
- Is SimSimi free?
According to the Google Play and Apple App Store listings, SimSimi is free to download with in-app purchases. According to twelve months of high-helpful Google Play reviews, the free tier is heavily token-gated. Users report 30 points required to read a message, a $2.99 one-time “No banner Ads” purchase, and a $2.50-per-month minimum to unlock conversational variety. Free-tier complaints are the single most consistent critical theme in the recent review sample.
- How old does SimSimi say users must be?
According to the SimSimi terms of service updated January 15, 2026, the minimum age is 13 worldwide. Apple rates the app 17+ in the United States and 16 or 17+ depending on region. Google Play rates it Teen. Age verification is self-declaration only, and SimSimi does not store the declared age. The 2018 Brazil investigation by Estadão documented a tester with a 2008 birth year (age 10) successfully creating an account.
- Does SimSimi share my conversations?
According to the SimSimi privacy policy, chat logs are collected automatically and the company holds a worldwide non-exclusive license to user content under terms of service Section 3.1. According to Exodus Privacy’s tracker scan of the Android app (version 8.9.8, scan dated April 2025), the app contained twelve advertising and analytics SDKs including AppLovin, Mintegral, Pangle, MixPanel, ironSource, and Taboola, several not named in the privacy policy partner list.
- Does SimSimi have a crisis-response feature?
According to our review of the privacy policy, terms of service, app store descriptions, and the SimSimi blog, no documented crisis-response protocol exists. The Bad Words Discriminator safety page on blog.simsimi.com is dated 2017 and has not been publicly updated. App Store reviewers in 2026 have explicitly called out the gap. The company has not published a crisis-handling SLA, transparency report, or moderation dashboard.
- Did SimSimi recently update its terms of service?
According to revision history on blog.simsimi.com, three terms-of-service updates landed between December 2025 and January 2026. Section 2.3 (December 29, 2025) added explicit AI-disclosure language. Section 2.4 (January 15, 2026) added a content-reporting flow. Section 1 (January 15, 2026) restructured age restrictions to a flat 13-and-up worldwide. The updates tightened disclosure but did not change the crowd-taught moderation architecture itself.