Meet 17 companies that recently announced they’re part of the YC Winter 2019 batch. To see more YC W19 companies read Part 1, Part 2, and Part 3.

InsideSherpa helps companies provide free online training courses to educate and recruit college students. Students build career skills in these courses by completing life-like online tasks so they can preview what a career at a particular company looks like. In the KPMG Data Science course, for example, 8,000+ students are completing tasks such as assessing a mock customer dataset and using visualization software to present insights on that dataset. InsideSherpa offers courses with global organizations including King & Wood Mallesons (commercial law), Y Combinator (full-stack engineering) and ANZ (Data Analytics).

Eatgeek connects restaurants, caterers, food trucks and chefs with people who need catering. What is unique about Eatgeek is that it integrates with caterers’ internal systems to help them automatically build and manage their relationships with catering customers. When Eatgeek connects a caterer on one side of the market, it simultaneously builds connections with thousands of customers on the other side of the market. Eatgeek is built by the former Head of Innovation at GrubHub, and the Lead Architect behind what GrubHub calls Restaurant Facing Technology (RFT). Together they created what was known as OrderHub, or what is more commonly recognized as the tablets that restaurants use to receive orders today.

jet.law brings predictability to legal bills using machine learning. jet.law is a full-service employment law firm that predicts the workload for litigation — enabling the firm to offer a flat monthly fee. Litigation fees can run from a few hundred to tens of thousands of dollars per month. With jet.law, there are no more monthly surprises.

ampUp is building the world’s largest reservable electric vehicle charging network out of shared private and home chargers. Electric vehicle owners can use the mobile app to locate, reserve, and navigate to chargers around the world. Owners of chargers can use the mobile app to make money by listing multiple chargers and setting the schedule and price. Today, hundreds of thousands of chargers are available worldwide through ampUp, and all reservations and payments are handled seamlessly through the app.

Keeper Tax automatically finds tax write offs for gig workers. Tax deductible expenses are identified among bank statements, using a team of certified bookkeepers aided by machine learning. Last year, the average US gig worker overpaid on taxes by 21% (that’s about $2,319, if you make $50k). Keeper Tax is founded by former head of product at Stride Tax, a mileage and expense tracking app with over 200,000 monthly active users.

Saratoga Energy manufactures better carbon nanotubes at one fifth the price. Carbon nanotubes are used in a variety of commercial applications. A single electric vehicles, for instance, use 1kg of carbon nanotubes in its batteries to improve charge rate and energy density. In 2018, 360,000 electric vehicles were sold in the U.S (up 80% over 2017). However, this is still less than 3% of the U.S. market. Concerns over slow charging are the limiting factor. Using higher concentrations of carbon nanotubes has demonstrated 3X faster charging, but this is cost prohibitive in the electric vehicle market. Due to Saratoga Energy’s breakthrough in manufacturing cost, this situation has now changed.

Stack Diagnostics (StackDx) is building 23andMe for Africa, 54gene. Through 54gene, StackDx provides genetic testing in Africa at affordable prices, while also solving the problem of the lack of African genetic information in drug development research. Alongside collaborators and partners in the US, Europe, and Africa, StackDx is seeking the next generation of targeted medicines that treat areas of unmet needs in the world’s population. They hope to help provide life saving tests to a continent that is often overlooked by genomic advances, yet holds the world’s most varied genetic information.

Avo prevents human error when implementing analytics. Every company is already or will soon be using analytics through tools like Amplitude, Segment, Looker, Google Analytics or even their custom pipeline. The problem is, humans suck at implementing analytics. They create bugs in their data all the time. Just like in their code. Except, while bugs in your code can be fixed, your data is permanent. Data bugs are irreparable damage. Avo prevents all that. When teams adopt Avo, every future product release will be faster and without data bugs. Doing analytics without Avo is like writing code without GitHub and throwing away your test suite. Avo is already used by customers such as Sotheby’s, Tempo, WOW air, Termius and Teatime Games. Read more about Avo in Northstack.

Lumos is a question answering engine that gives doctors direct answers to complex clinical questions at the point of care. Doctors currently have to look through textbooks or articles, or deal with sources meant for consumers. Lumos uses recent NLP methods to deeply understand medical sources and provide instant, trustworthy answers. The product went live at UPenn Medical last week and is already used daily by 40% of the student population. The team has shipped products at Google Search and Facebook, and has done bio/AI research at Alphabet’s Calico Labs and Stanford.

Allo is building neighborhoods that work for families. The modern family deserves a modern village. With Allo, parents can meet other parents nearby to plan playdates, swap sits, and coordinate carpool. As a new mother, CEO and co-founder, Catherine Hrdy, understands the need for nearby social and practical support first-hand. Since beginning YC in January, Allo has rolled out its app to target neighborhoods in San Francisco and is growing more than 100% WoW.

Pyxai makes HR software to screen and rank 100% of a job applicant pool for soft skills, job qualifications and culture fit, without relying on resumes. Pyxai helps companies eliminate unintended biases in the hiring process and consequently identifies talent that would otherwise be overlooked. Working with leading soft skill psychologists and years of research data, Pyxai’s AI driven platform can extract the skills from each candidate that are better indicators of long term success in an organization.

Bensen makes software that lets restaurants take orders via voice assistants such as Amazon Alexa & Google Assistant. With the explosion of the voice market, large chains such as Domino’s and Starbucks have already launched voice programs, and other restaurants are eager to catch up. Bensen lets any restaurant chain connect with the over 43% of US consumers who own a smart speaker. Bensen was founded by Dr. David Xiao, a Princeton PhD with machine learning expertise, and former restaurateur Adam Sandler (real name), who founded a multi-location restaurant chain and has deep first-hand experience in the domain.

Centaur Labs enables customers to build AI algorithms that detect cancers and fight disease. The company uses crowdsourcing to label medical images and video datasets; on their iOS app, DiagnosUs, medical students and professionals already analyze tens of thousands of images per day. The opinions of multiple people and algorithms are then combined into one highly accurate analysis, a technique developed by CEO Erik Duhaime during his PhD at the MIT Center for Collective Intelligence. Centaur Labs has also received funding from LEO Innovation Lab, the digital innovation arm of LEO Pharma A/S, a 5,000-person, global pharmaceutical company. The partnership enabled Centaur to accelerate the development of their dermatology algorithms.

Allure Systems uses AI to achieve size inclusivity in fashion photography. The service enables fashion brands and apparel retailers to automatically create images of styles on models ranging from petite to plus size — all in a cost- and time-efficient way. Today, 67% of Americans buy a size 12 and above; yet 90% of online catalogs do not represent these women.

Travelchime is the simplest way to plan a trip. Travelers can organize and arrange destinations, which appear on a map and link out to business hours and more, and easily research activities and restaurants with info from blog itineraries, guidebooks, and lists from around the web. When the itinerary is complete, the destinations can be exported to Google Maps. Travelchime was founded by identical twins Peter Xu and Harry Yu, who had built BookWithMatrix and All the Flight Deals, two other travel sites that process over $500k/month in bookings.

Bottomless sends you freshly roasted coffee, delivered exactly when you need it. Their smart scale detects when you’re low on beans and triggers a re-order. Though their tech can be used with a wide array of products (think staples like laundry detergent, hand soap, sugar), they’re starting with coffee — and they already have distribution deals with with roasters including Four Barrel and Philz Coffee. They’re launched, have hundreds of subscribers and they’re seeing two to three times as many orders in the first twelve months, compared to a typical coffee subscription. Read about Bottomless in TechCrunch.

The Juggernaut is a new subscription publication for the South Asian diaspora. South Asians have long been misrepresented and underreported in international media, and The Juggernaut is changing that. They started as a weekly newsletter that grew to thousands within a few months. Read about The Juggernaut in TechCrunch.