MainStem
MainStem is a Seattle-based B2B SaaS company, founded in 2014, that provides a cloud-based procurement, finance, and supplier management platform purpose-built for cannabis operators and suppliers across the United States.
- Company typePrivate
- Founded2014
- HeadquartersSeattle, United States
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What MainStem does
MainStem, Inc. is a privately held B2B SaaS company founded in 2014 in Seattle, Washington, that operates a cloud-based procurement, finance, and supplier management platform purpose-built for the US cannabis industry. The platform unifies three core product modules — Procurement (multi-supplier marketplace with approval workflows, PO automation, and spend analytics), Finance (consolidated accounts payable, three-way matching, and multi-rail payments), and Suppliers (supplier portal for catalog, pricing, order fulfillment, and shipment consolidation) — on a shared data layer with native bidirectional sync into mainstream ERP and accounting systems (QuickBooks, Microsoft Dynamics 365, Sage Intacct, Acumatica) and cannabis-specific platforms (Dutchie, QuantumLeaf, seed-to-sale systems).
The company serves two customer segments on the same network: cannabis operators (multi-state operators, dispensaries, and cultivators managing procurement across multiple locations) and cannabis suppliers (packaging, hardware, ingredients, and MRO vendors) seeking access to those operators. Its go-to-market is sales-led enterprise field motion, with personalized demos, ROI reviews, and integration scoping tailored to each prospect's footprint, spend, and existing ERP stack; pricing is quote-based and not publicly disclosed. Distribution is exclusively direct, with no reseller or self-service channel.
MainStem monetizes primarily through recurring platform subscriptions, with the commercial model anchored on multi-location operators and network participation from suppliers. The company is venture-backed by Merida Capital Holdings ($2.175M in 2018, $5.0M Series A in August 2021), employs 11-50 people, holds SOC 2 Type 2 certification (2022, Prescient Assurance), and has been recognized on the Inc. 5000. It reports hundreds of operator locations, thousands of users, and 193% year-over-year network growth.
MainStem firmographics
Firmographics- Name
- MainStem
- Legal name
- MainStem, Inc.
- Website
- https://mainstem.io
- Company type
- Private
- Founded year
- 2014
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- MainStem is a Seattle-based B2B SaaS company, founded in 2014, that provides a cloud-based procurement, finance, and supplier management platform purpose-built for cannabis operators and suppliers across the United States.
- Ownership category
- akta.pro rank
MainStem industry classification
Industry- Product category
- Cannabis Procurement Software
- NAICS
- Software Publishers (5132), Software Publishers (51321), Custom Computer Programming Services (541511)
- SIC
- Services-Computer Programming, Data Processing, Etc. (7370)
- akta.pro primary industry
- Cannabis Online Ordering for Delivery (Marketplace/Aggregator) (CRANAGAD)
Keywords
Where MainStem is headquartered
LocationHeadquarters
- HQ city
- Seattle
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
MainStem business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure
Revenue model
- Platform Subscription / SaaS: MainStem operates as a B2B SaaS procurement platform serving cannabis operators and suppliers. The platform unifies procurement, finance, and supplier operations with pricing likely based on subscription tiers related to company size, location count, and transaction volume. The company demonstrates sales-led enterprise motion with demo requests and personalized walkthroughs as primary customer acquisition channels.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels5 records
MainStem product offering
Product offeringCore offering
MainStem operates a cloud-based B2B procurement software platform built specifically for the cannabis industry. The platform combines a vetted multi-supplier marketplace with procurement workflow automation, approval routing, accounts payable, and native integrations to ERP/accounting and seed-to-sale systems, enabling cannabis operators to centralize purchasing and supplier management in a single system.
Product overview
MainStem is a unified B2B procurement platform built for the cannabis industry, consisting of three integrated core products: Procurement (multi-supplier marketplace with approval workflows and PO automation), Finance (consolidated accounts payable, ERP sync, and payment processing), and Suppliers (supplier portal for catalog management and order fulfillment). All three modules share a common data layer enabling unified procurement, finance, and supplier operations. The platform also includes free developer tools (JSON Viewer, JSON to CSV, CSV to JSON) and an Open API for custom integrations.
Differentiator
Problem solved
Functional benefit
Products and services
- MainStem Procurement Platform
- MainStem Finance Module
- MainStem Supplier Marketplace
- JSON Viewer
- JSON to CSV Converter
- CSV to JSON Converter
- MainStem Open API
Quantifiable outcome
- 193% Year-over-year network growth
- +2 more outcomes
Companies that use MainStem
Customer profileSegments2 records
Ideal customer profiles2 records
MainStem technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration18 records
Feature10 records
MainStem partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered core.
- QuickBookscoreNative two-way integration syncing vendors, bills, payments, and GL coding. Supports both QuickBooks Online and Desktop versions. Enables real-time bidirectional data flow between MainStem procurement and QuickBooks accounting.
- Microsoft Dynamics 365coreNative integration pushing purchase orders, invoices, and payments into Dynamics with full multi-entity support for multi-location operators.
- Sage IntacctcoreMulti-entity AP, GL coding, and bill sync built for finance teams that need an audit trail. Native integration designed for growing multi-location operators.
- ShopifycoreNative integration syncing product catalog, orders, and inventory between Shopify and the MainStem network for cannabis ecommerce operations.
- DutchiecoreNative cannabis-specific integration connecting dispensary point-of-sale data directly to procurement with SKU-level demand signals. Key cannabis industry platform partnership.
- QuantumLeafcoreCannabis-specific integration connecting QuantumLeaf operational data with purchasing, finance, and supplier workflows. Part of cannabis-specific toolset.
Scale indicators4 records
Recent moves6 records
Expansion highlights5 records
MainStem competitors and assessment
Company assessmentMarket position
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights6 records
Customer concentration
MainStem social profiles
Digital presenceMainStem compliance and trust
Trust signalCompliance1 record
MainStem financial estimates
Financial estimateRevenue estimate
Valuation estimate
MainStem leadership team
Management profileNumber of profiles
Profiles2 records
MainStem funding detail
Funding detailFunding overview
Funding rounds2 records
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
MainStem M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about MainStem
What does MainStem do?
MainStem operates a cloud-based B2B procurement software platform built specifically for the cannabis industry. The platform combines a vetted multi-supplier marketplace with procurement workflow automation, approval routing, accounts payable, and native integrations to ERP/accounting and seed-to-sale systems, enabling cannabis operators to centralize purchasing and supplier management in a single system.
Is MainStem a public or private company?
MainStem is a private company. It is classified as venture growth investor backed and is currently operating.
When was MainStem founded?
MainStem was founded in 2014. It employs 11 to 50 people.
Where is MainStem based?
MainStem is headquartered in Seattle, United States, in the North America region.
How does MainStem make money?
One revenue line is on record: platform Subscription / SaaS.
Does MainStem have an API?
Yes. REST endpoints for catalog, orders, and AP. Build custom integrations or wire in your own ERP. Developer documentation is at Not specified.
What industry is MainStem in?
MainStem's product category is Cannabis Procurement Software. Its primary akta.pro industry code is CRANAGAD, Cannabis Online Ordering for Delivery (Marketplace/Aggregator). Its NAICS code is 5132 and its SIC code is 7370.