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Rhubarb Labs
Techstars '24Dover, US · Founded 2023 · 2 employees on LinkedIn · 2 known investors
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Rhubarb is a community platform and AI-powered system that connects gardeners to track progress, share experiences, and access local expert support. It combines smart hardware (self-watering planters) with a social network to foster local gardening knowledge and resilience.
Also known as joinrhubarb · Rhubarb
Founders & leadership
Rhubarb Labs was founded in 2023 by Whitney Klonsky.
Investors · 2
How we know: the company's own site · the Techstars portfolio · open dataset · Top 3000 Accelerator Startups (no YC) 2026-08 · Not right? Tell us
Company profile
researched Sep 2026Rhubarb Labs operates Rhubarb, a consumer gardening product that helps people grow food at home by combining an AI assistant with community and professional support. The core of the product is "Ruby," an AI assistant that is given information by the user about their climate, soil, location, growing zone and planting history, and then produces a weekly plan covering what to plant, water and protect, along with on-demand answers to gardening questions. The company positions Ruby against generic general-purpose chatbots by emphasizing garden-specific context supplied directly by the user rather than scraped web content.
Around the assistant, Rhubarb layers social and expert features: users can ask questions and receive plain-language answers from a local community, professionals and Ruby; share gardens and collaborate with family, friends and pros; create private, invite-only groups for households, blocks, schools, interest groups or community gardens; and message or book a gardening coach in-app as an optional add-on. Additional features described include voice-to-text field notes, weather alerts and location- and crop-specific nudges rather than generic zone guidance.
A page maintained by Drew Klonsky describes Rhubarb's broader aim as serving individuals, businesses and environmental resilience: using transparent AI to turn first-hand grower experience into knowledge, providing businesses with first-party insight sourced directly from growers, and supporting local resilience through decisions grounded in real local conditions. That page frames the AI as amplifying rather than replacing human experience.
Business model
Rhubarb sells a paid consumer subscription to its app, explicitly stating that it does not run ads or sell user data and that subscriber support funds the service. The subscription bundles unlimited "Ask Ruby" answers, a weekly plan with weather alerts, unlimited sharing and collaboration, and private invite-only groups; on-demand professional help through in-app messaging or booking of a gardening coach is offered as an optional add-on. A secondary stated model is supplying businesses with first-party insight gathered directly from growers.
Consumer subscription fees, with an optional paid add-on for on-demand access to gardening coaches; the company states it does not monetize through advertising or data sales.
Traction
The company's website states that thousands of growers and businesses are on the platform; no further audience, revenue or funding figures are disclosed in available sources.
Latest developments
The product is described as live and available at joinrhubarb.com, with paid subscription tiers offered.
▸Full profile — market position, technology, go-to-market, geography
Market position
Rhubarb positions itself as an alternative to social-network gardening communities and generic AI chatbots, arguing those channels deliver conflicting, non-local advice and monetize users through advertising and data. Its stated differentiators are locality, garden-specific memory and an advertising-free, non-data-selling subscription model. The site says a community of thousands of growers and businesses uses Rhubarb.
Combines a garden-aware AI assistant that retains user-supplied context about a specific garden with access to local community members and paid professional coaches, delivered under a subscription model with stated commitments to no advertising and no sale of user data.
Technology
An AI assistant, Ruby, personalized with user-provided details on location, climate, soil, growing zone and prior plantings, which generates weekly planting, watering and protection plans, answers questions on demand and issues weather alerts and timing-based nudges. The app supports voice-to-text note taking for use while gardening. The company describes its approach as honest, transparent AI built on authentic first-hand grower signals rather than scraped or secondhand data, and states that it does not sell user data.
Go-to-market
Direct-to-consumer via the joinrhubarb.com website with a "Try Rhubarb" sign-up and a paid subscription, supported by positioning against incumbent channels for gardening help such as Facebook groups, Reddit, Instagram and general-purpose AI chatbots. Group and collaboration features allow existing users to bring in family, friends, neighbors and professionals.
Home food growers and hobby gardeners seeking localized guidance, plus families, neighborhood blocks, schools, community gardens and interest groups using private shared spaces; the company also references businesses and organizations that support growers.
Geography
Guidance is personalized to a user's location and growing zone; the site does not specify markets served beyond that.
Compiled by commissioned research from 7 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
▸Research sources · 7
primary sources listed
- Rhubarb Labsjoinrhubarb.com · web
7 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Rhubarb Labs do?
- Rhubarb is a subscription app pairing an AI garden assistant, "Ruby," with local community and professional help for home food growers.
- Who founded Rhubarb Labs?
- Rhubarb Labs was founded by Whitney Klonsky in 2023.
- Who are Rhubarb Labs's investors?
- Rhubarb Labs's investors include Techstars, Kube VC.
- Where is Rhubarb Labs headquartered?
- Rhubarb Labs is headquartered in Dover, US.