Mainvest Review 2026: What Happened, and What the SEC Filings Show

Mainvest described itself as 'the investment platform for Main Street': a Regulation Crowdfunding funding portal, operated by MainVest, Inc. of Salem, Massachusetts, where anyone 18 or older with a US bank account could invest from $100 in local brick-and-mortar businesses, mostly restaurants, bars, breweries, cafes and bakeries. The typical security was a revenue-sharing note: the business paid investors a stated share of its gross revenue each quarter until they had received a maximum multiple, usually 1.5x, or a maturity date passed. Investors paid no fees; the business paid Mainvest a percentage of the raise on a successful close. The site advertised 10-25% target returns and a vetting process that accepted about 5% of applicants. Mainvest hosted 779 offerings between October 2018 and early 2024 and ceased operations on June 14, 2024.

Its banking partner, Synapse Financial Technologies, filed for Chapter 11 on April 22, 2024, and Evolve Bank then froze payment processing for Synapse clients, which locked Mainvest's investor and business wallets. On May 17, 2024 Mainvest announced it would wind down, citing the uncertainty around the Synapse bankruptcy as the catalyst. Repayments through the portal were accepted through May 22, investors were emailed their portfolio and transaction histories, and operations ceased June 14. Roughly $2.4 million of user funds were frozen in the Synapse estate. Synapse was the trigger; the vulnerability was already on file. The company's own Form C, filed on Republic in November 2022, had disclosed a $2.08 million annual loss, about 2.5 months of runway and a going-concern paragraph, and no arrangement existed for servicing the notes if the portal stopped.

Yes. The note is an obligation of the business you invested in, not of Mainvest, and it survived the portal's closure. What ended was the servicing: Mainvest collected each business's revenue share, computed it against your multiple, distributed it to your wallet and issued tax documents, and no successor took over any of that. In practice you need the Revenue Sharing Agreement and the June 2024 transaction history, a direct relationship with the issuer, and your own ledger. The notes' dispute clauses provide for individual arbitration in Massachusetts and waive class actions. Consult a securities attorney before assuming any recovery, and check EDGAR under the issuer's name for a Form C-AR (still reporting) or C-TR (reporting terminated).

There is no public answer. About $2.4 million of Mainvest user funds froze in May 2024 inside Synapse's ledger. The court-appointed trustee said in October 2024 that frozen funds should be returned by year end, but the reconciliation found a shortfall of $65 million to $96 million across all Synapse programs, and the Chapter 11 case was dismissed on November 14, 2025 with up to $95 million of end-user funds unresolved. The CFPB's $1 settlement, approved in September 2025, allows redress from the agency's civil penalty fund, but at last report affected users had not been contacted. AltStreet found no public accounting of Mainvest-specific recoveries. Keep records of your balance as of May 2024 and monitor the trustee's and the CFPB's notices.

A business issued unsecured, subordinated notes under Regulation Crowdfunding and agreed to pay investors a stated percentage of its gross revenue each quarter until they had received a maximum payment multiple, or a payment deadline passed. In the 701 Ops offering AltStreet read in full, the revenue percentage slid from 1.5% at the $250,000 target to 6.0% at the $1,000,000 maximum, the multiple was 1.5x, sharing began 365 days after the offering deadline, and the payment deadline was January 1, 2031. Transfer required the company's consent. Investors paid Mainvest nothing. Issuers paid a percentage of the raise, only if the offering succeeded: a flat 6% through 2021, then 3% on investors the issuer introduced and 9% on all others from 2022, then 4.5% on in-network users and 9% on all others from 2023.

From at least January 2022 the homepage read 'Join a community of investors accessing 10-25% target returns with as little as $100', with 'Quarterly repayments' and 'No investor fees' beneath it. On a revenue-sharing note the ceiling is the multiple: a 1.5x note returns at most 50% over its life, however long that takes, and the stated range was a target, not a realized figure. The only repayment-quality statistic Mainvest ever published, '96%+ of Mainvest businesses are on track with repayments', appeared on the January 2022 homepage and was gone by January 2023, replaced by a count of repayments processed. Its own 2020 FAQ answered 'Are these safe investments?' with 'Far from it!' No filing carries a repayment ledger, and AltStreet cannot compute a realized return for any Mainvest note from public data.

No evidence supports calling it a scam. MainVest, Inc. was an SEC-registered funding portal (file 007-00162) and FINRA member (CRD 298384), every offering filed a Form C, and the operator's own Regulation Crowdfunding filing on Republic disclosed its losses, its runway and a going-concern paragraph in November 2022. AltStreet's legal and enforcement scan found no SEC litigation release, FINRA disciplinary action, receivership or class action involving MainVest, Inc. or Mainvest Holdings Corp as of September 2026. What the record shows is a venture-stage company that never published repayment data, enforced almost no post-raise reporting by its issuers, made unsubstantiated claims about default rates, and had no plan for its notes when its banking intermediary failed. The registration was never withdrawn, so FINRA still lists the firm, which reflects an unfiled form, not ongoing supervision.

Yes. Mainvest Holdings Corp, the portal's parent, filed a Regulation Crowdfunding Form C through OpenDeal Portal LLC (Republic) on November 3, 2022, offering a Crowd SAFE with a $15 million post-money valuation cap, a $500 minimum, a $25,000 target and a $1,235,000 maximum. The offering closed on January 3, 2023 at $385,795 from 282 investors per the campaign page. The Form C is the most informative document in the record: reviewed financial statements for fiscal 2022 showing $497,978 of revenue, a $2,081,237 net loss, $205,000 of cash described as 2.5 months of runway, and a substantial-doubt going-concern paragraph. The company filed one annual report, in April 2023, and nothing since. Investors in that SAFE hold an instrument in a company that ceased operations 17 months after the close.

No. Mainvest took its site dark on June 12, 2024 and ceased operations on June 14; mainvest.com now shows only a closure notice, and the login, investor dashboard and support center are gone. Before closing, Mainvest emailed each investor their portfolio and transaction history. If you did not keep that email, your remaining records are the Form C for each offering on EDGAR, the Revenue Sharing Agreement you signed, and your bank statements showing transfers to and from your Mainvest wallet. For wallet balances frozen in May 2024, keep any statement showing the balance; those are claims in the Synapse matter, not something Mainvest can release.

All three are Regulation Crowdfunding portals open to non-accredited investors at about $100, and Mainvest's own filing named Honeycomb Credit and SMBX as its competitors. The instruments differ. Wefunder sells mostly startup equity and SAFEs, where the return depends on a future exit, and charges investors a roughly 2% transaction fee. Honeycomb sells fixed-rate amortizing loans to the same Main Street borrower base as Mainvest, often with a lien and a personal guaranty, and charges investors a 3% ACH fee. Mainvest sold unsecured, subordinated revenue-sharing notes with no investor fee and an issuer fee that rose to 9%. Wefunder and Honeycomb are operating; Mainvest ceased in June 2024. What all three share is what none publishes: repayment data and any disclosed arrangement for servicing the notes if the portal ceases. Mainvest is the case study in why that second silence matters.

Four, each drawn from a specific Mainvest fact. First, read the operator's own EDGAR filings: Mainvest Holdings Corp disclosed a going-concern doubt and 2.5 months of runway 18 months before it closed. Second, ask in writing what happens to collections if the portal stops, and whether a backup servicer or repayment escrow exists: Mainvest's answer was that issuers were responsible for themselves. Third, count filings on EDGAR rather than trusting a success page: 47% of Mainvest's listings were withdrawn and 17 of 379 funded issuers ever filed an annual report. Fourth, keep uninvested cash in your own bank: the $2.4 million frozen in May 2024 was in platform wallets on a fintech intermediary's ledger. Operator risk is investment risk even when the operator is only an intermediary.