# Alessio Signorini

> Personal website of Alessio Signorini — CTO & Co-Founder at Evidation Health. AI researcher and builder. Health tech, LLMs, and AI agents. PhD in AI & Epidemiology from the University of Iowa.

Alessio has been working on ML/AI since before it was cool. He earned a PhD in AI & Epidemiology at the University of Iowa, worked in big search engines (Ask.com, OneRiot), launched a couple of startups (IMRSV/Immersive Labs — acquired by Kairos), and co-founded Evidation Health, a $1B digital health platform deeply infused with AI, where he leads a cross-functional org spanning product, engineering, infrastructure, data science, and TPM. He is based in Santa Barbara, CA.

Key facts:
- Co-Founder & CTO at Evidation Health (2013–present), a digital health platform with $250M+ in funding
- Previously Director of Technology at Ask.com and OneRiot (acquired by Walmart Labs)
- Co-founded IMRSV/Immersive Labs for billboard analytics (acquired by Kairos); TechStars NYC 2011
- Robert Wood Johnson Foundation Award — #1 Most Influential Research (2011)
- Research spans web search, computational epidemiology, digital biomarkers, and AI agents
- ~3,000 citations on Google Scholar
- Active open-source contributor and early-stage startup advisor/investor

## Pages

- [About](https://alessiosignorini.com/): Homepage with bio, career path, and current explorations
- [Publications](https://alessiosignorini.com/publications/): Research papers, conference proceedings, and patents
- [Projects](https://alessiosignorini.com/projects/): Open-source tools and experiments — from AI agents to health tech
- [Speaking](https://alessiosignorini.com/speaking/): Conference talks, keynotes, and media appearances on AI, health tech, and search
- [Resume](https://alessiosignorini.com/resume/): Career overview — education, experience, awards, and skills
- [Press](https://alessiosignorini.com/press/): Media coverage from NYT, CNN, Business Insider, Corriere della Sera, and others
- [Contact](https://alessiosignorini.com/contact/): Contact form for inquiries
- [Speaker Kit](https://alessiosignorini.com/speaker-kit/): Bio, headshot, and booking information

## Publications

- [Helios: A Complete Meta-Search Engine](https://alessiosignorini.com/publications/helios-meta-search-engine/): 2004, Alessio Signorini
- [Building an Open Source Meta-Search Engine](https://alessiosignorini.com/publications/build-meta-search-engine/): 2005, Alessio SignoriniAntonio Gulli, Proceedings of the 14th International World Wide Web Conference (WWW 2005)
- [The Indexable Web is More than 11.5 Billion Pages](https://alessiosignorini.com/publications/indexable-web-size/): 2005, Alessio SignoriniAntonio Gulli, Proceedings of the 14th International World Wide Web Conference (WWW 2005)
- [A Survey of Ranking Algorithms](https://alessiosignorini.com/publications/ranking-algorithms-survery/): 2005, Alessio Signorini
- [Systems and methods for personalizing a newspaper](https://alessiosignorini.com/publications/ask-personalizing-a-newspaper/): 2007, Alessio SignoriniGiuseppe OttavianoAntonio Gulli
- [Systems and methods for visually selecting information](https://alessiosignorini.com/publications/ask-visually-selecting-information/): 2008, Antonio GulliAlessio Signorini
- [System and method for categorizing answers such as urls](https://alessiosignorini.com/publications/ask-answers-and-url-classification/): 2008, Alessandro ArzilliApostolos GerasoulisAntonino GulliMaurizio SambatiAlessio Signorini
- [Distributed Marketplaces using P2P Networks and Public-Key Cryptography](https://alessiosignorini.com/publications/distributed-marketplace-p2p-public-key-cryptography/): 2008, Alessio SignoriniAntonio GulliAlberto Maria Segre, Proceedings of the 3rd International ICST Conference on Scalable Information Systems (Infoscale 2008)
- [Systems and methods for classifying search queries](https://alessiosignorini.com/publications/ask-classifying-search-queries/): 2008, Alessio SignoriniAlessandro ArzilliNitin Mangesh ShettiAbhishek Mehrota
- [Social Web Information Monitoring for Health](https://alessiosignorini.com/publications/social-web-monitoring-health/): 2009, Alessio Signorini
- [Method and system for determining confidence in answer for search](https://alessiosignorini.com/publications/ask-determining-confidence-in-answers/): 2009, Yufei PanHui LiJustin SarmaDavid SoukalAlessio SignoriniApostolos GerasoulisTomasz Imielinski
- [Method and system for determining a relevant content identifier for a search](https://alessiosignorini.com/publications/ask-relevant-content-identifier-for-search/): 2009, Apostolos GerasoulisTomasz ImielinskiMing LiYufei PanAlessio SignoriniJiankuan Ye
- [System and method for providing web search results to a particular computer user based on the popularity of the search results with other computer users](https://alessiosignorini.com/publications/oneriot-ranking-popularity/): 2009, Alessio SignoriniIoannis PavlidisNathaniel FisherScott EngstromPeter J. NewcombDavid L. YoungRon Benson
- [If you ask nicely, I will answer: Semantic Search and Today's Search Engines](https://alessiosignorini.com/publications/semantic-search-engine-sensitivity/): 2009, Tomasz ImielinskiAlessio Signorini, Proceedings of the 3rd IEEE International Conference on Semantic Computing (IEEE-ICSC 2009)
- [Using Twitter to Estimate H1N1 Influenza Activity](https://alessiosignorini.com/publications/twitter-estimate-h1n1-influenza/): 2010, Alessio SignoriniPhilip PolgreenAlberto Segre, Proceedings of the 9th Annual Conference of International Society for Disease Surveillance (ISDS 2010)
- [The Use of Twitter to Track Levels of Disease Activity and Public Concern in the US during the Influenza A H1N1 Pandemic](https://alessiosignorini.com/publications/twitter-track-disease-activity-h1n1/): 2011, Alessio SignoriniAlberto Maria SegrePhilip M. Polgreen, PLoS ONE
- [Inferring Travel from Social Media](https://alessiosignorini.com/publications/inferring-travel-social-media/): 2011, Alessio SignoriniAlberto Maria SegrePhilip M. Polgreen, Proceedings of the 10th Annual Conference of International Society for Disease Surveillance (ISDS 2011)
- [Electronic Word of Mouth on Twitter About Physical Activity in the United States: Exploratory Infodemiology Study](https://alessiosignorini.com/publications/word-mouth-twitter-physical-activity/): 2013, Ni ZhangAlessio SignoriniShelly CampoKathleen F. JanzPetya EcklerJingzhen YangLinda G. Snetselaar, Journal of Medical Internet Research
- [Use of Social Media to Monitor and Predict Outbreaks and Public Opinion on Health Topics](https://alessiosignorini.com/publications/social-media-predict-health-topics/): 2014, Alessio Signorini
- [Evidence Generation and Data Interpretation Platform](https://alessiosignorini.com/publications/evidation-evidence-generation-data-interpretation-platform/): 2015, Luca FoschiniAlessio SignoriniTom QuiselChristine LemkeUrsula Nasch
- [Behavioral Phenotyping of Digital Health Tracker Data](https://alessiosignorini.com/publications/behavioral-phenotyping-digital-health-tracker-data/): 2016, Luca FoschiniThomas QuiselAlessio Signorini, Proceedings of the SIAM International Conference on Data Mining (SDM 2016), Workshop on Data Mining for Medicine and Healthcare
- [Collecting and Analyzing Millions of mHealth Data Streams](https://alessiosignorini.com/publications/collecting-and-analyzing-millions-of-mhealth-data-streams/): 2017, Tom QuiselLuca FoschiniAlessio SignoriniDavid Kale, Proceedings of the 23rd ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD 2017)
- [Novel Digital Voice Biomarkers of Dementia](https://alessiosignorini.com/publications/digital-voice-biomarkers-dementia/): 2018, David StuckAlessio SignoriniTuka AlhanaiMaggie SandovalChristine LemkeJim GlassScott HardyM. LavalleeB. WassermanT. AngChristine NowakRhoda Au, Alzheimer's Association International Conference (AAIC 2018)
- [Influenza Surveillance Using Wearable Mobile Health Devices](https://alessiosignorini.com/publications/influenza-surveillance-using-wearable-mobile-health-devices/): 2019, Benjamin BradshawKevin J. KontyErnesto RamirezWei-Nchih LeeAlessio SignoriniLuca Foschini, Proceedings of the 19th Annual Conference of International Society for Disease Surveillance (ISDS 2019)
- [Developing Measures of Cognitive Impairment in the Real World from Consumer-Grade Multimodal Sensor Streams](https://alessiosignorini.com/publications/developing-measures-cognitive-impairment-multimodal-sensor-streams/): 2019, Richard ChenFilip JankovicLuca FoschiniLampros KourtisAlessio SignoriniNikki MarinsekMelissa PughJie ShenRoy YaariVera MaljkovicMarc SungaHan Hee SongHyun Joon JungBelle TsengAndrew Trister, Proceedings of the ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD 2019)
- [Dynamic Behavioral Phenotyping for Predicting Health Outcomes](https://alessiosignorini.com/publications/evidation-dynamic-behavioral-phenotyping/): 2020, Luca FoschiniTom QuiselChristine LemkeArya PourzanjaniHaraldur Tomas HallgrimssonJessie JuusolaAlessio SignoriniUrsula Nasch
- [Systems and Methods for Detecting Cognitive Decline with Mobile Devices](https://alessiosignorini.com/publications/evidation-detecting-cognitive-decline-mobile-devices/): 2021, Richard Jia Chuan ChenLuca FoschiniFilip Aleksandar JankovicHyun Joon JungLampros KourtisVera MaljkovicNicole Lee MarinsekMelissa Anna Maria PughJie ShenAlessio SignoriniHan Hee SongMarc Orlando SungaAndrew Daniel TristerBelle TsengRoy Yaari
- [Cognitive Digital Biomarkers from Automated Transcription of Spoken Language](https://alessiosignorini.com/publications/cognitive-digital-biomarkers-automated-transcription/): 2022, Nazli TavabiDavid StuckAlessio SignoriniCody KarjadiTuka Al HanaiMaggie SandovalChristine LemkeJames GlassScott HardyMichelle LavalleeBryan WassermanTing Fang Alvin AngChristiane M. NowakRaghu KainkaryamLuca FoschiniRhoda Au, The Journal of Prevention of Alzheimer's Disease


## Projects

- [Golinks](https://alessiosignorini.com/projects/golinks/): 
- [Oss_audit](https://alessiosignorini.com/projects/oss-audit/): 
- [Calendars](https://alessiosignorini.com/projects/calendars/): 
- [Apimock](https://alessiosignorini.com/projects/apimock/): 
- [Helpmebuy](https://alessiosignorini.com/projects/helpmebuy/): 
- [Morning Reads](https://alessiosignorini.com/projects/morning-reads/): 
- [Chrome Extension Passphrase Generator](https://alessiosignorini.com/projects/chrome-extension-passphrase-generator/): 
- [Google Tasks To Calendar](https://alessiosignorini.com/projects/google-tasks-to-calendar/): 
- [Slack Channel Summarizer](https://alessiosignorini.com/projects/slack-channel-summarizer/): 
- [Keep In Touch](https://alessiosignorini.com/projects/keep-in-touch/): 
- [Itinerary Sharing](https://alessiosignorini.com/projects/itinerary-sharing/): 
- [Blog Copilot](https://alessiosignorini.com/projects/blog-copilot/): 
- [Google Photos Account Migration](https://alessiosignorini.com/projects/google-photos-account-migration/): 
- [Resources Manager](https://alessiosignorini.com/projects/resources-manager/): 
- [Health Chat](https://alessiosignorini.com/projects/health-chat/): 
- [Agents Workflow Github App](https://alessiosignorini.com/projects/agents-workflow-github-app/): 
- [Triage Email](https://alessiosignorini.com/projects/triage-email/): 
- [Slack Timelog Bot](https://alessiosignorini.com/projects/slack-timelog-bot/): 
- [Slack Meet Command](https://alessiosignorini.com/projects/slack-meet-command/): 


## Optional

- [Google Scholar](https://scholar.google.com/citations?user=kGm8x6sAAAAJ): Full list of publications and citation metrics
- [GitHub](https://github.com/alessio-signorini): Source code and open-source contributions
- [LinkedIn](https://www.linkedin.com/in/alessiosignorini): Professional profile
- [Blog](https://blog.alessiosignorini.com): Long-form writing on AI, health tech, and engineering