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Payy raises $6m seed to build private stablecoin payments on zero-knowledge rails

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Stablecoin payments firm TransFi raises over $19M to expand services

Payy raised $6m led by FirstMark to build a zero-knowledge L2 and wallet that make USDC payments private by default, targeting enterprise stablecoin flows that avoid fully transparent chains.

Payy, a stablecoin startup building a privacy-focused payments network on zero-knowledge infrastructure, has raised $6 million in seed funding led by FirstMark Capital — an early backer of Airbnb, Shopify, and Pinterest — with participation from Robot Ventures and DBA Crypto, the company announced Wednesday. According to The Block, the round closed in December 2025 and was structured as a simple agreement for future equity (SAFE) with attached token warrants, bringing Payy’s total capital raised to $8 million including a $2 million pre-seed raised under its former identity as Polybase.

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“We were preempted by FirstMark,” Payy co-founder and CEO Sid Gandhi told The Block. The company’s core argument is one that a growing chorus of stablecoin builders are raising — that on-chain payments are too transparent to attract serious enterprise volume. “Today, sending a stablecoin payment is like posting your bank statement on a public website,” Gandhi said. “Every amount, every recipient, every balance, visible to anyone. Enterprises will never move meaningful payment flows onchain if every transaction is visible to the world.” A previous crypto.news opinion made a similar case, arguing that if stablecoins aren’t private, nothing is.

Payy was originally founded as Polybase, a web3 database project, before pivoting toward stablecoin payments in 2023. Gandhi said the pivot came from realizing that zero-knowledge technology built for the database could plug what he sees as a structural gap in the stablecoin stack. The company now offers a self-custodial wallet — launched in January 2024 — and a Visa card that went live in August 2025, allowing users to spend USDC anywhere Visa is accepted while keeping on-chain transactions private.

Payy’s longer-term infrastructure play is the Payy Network, an Ethereum Layer 2 rollup using zero-knowledge proofs to shield transaction details including sender, receiver, and amounts. The company announced the network last month. A testnet is expected to launch next month, with a mainnet rollout planned for this summer. A native token is also in the pipeline, though Gandhi declined to set a timeline. A previous crypto.news story on USDCx highlighted how Aleo’s zero-knowledge infrastructure is pursuing a near-identical thesis — private stablecoin transfers with selective regulatory disclosure — suggesting the market for this architecture is becoming genuinely competitive.

Payy is based in New York and has a team of 12, with plans to hire across business development and engineering. The platform currently serves more than 100,000 users across 120 countries, processing roughly $130 million in annualized transaction volume. The company generates revenue through onramping fees, gas fees, and enterprise contracts.

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Gandhi said a dozen design partners are already building on the testnet to add privacy to “billions of dollars of stablecoin flows,” and framed the FirstMark relationship as a direct channel into enterprise distribution. “With the FirstMark investment, we have access to some of the best technology-forward companies on the planet, who we plan to onboard to stablecoins in the coming months,” he said. Payy now joins a broader wave of stablecoin infrastructure startups attracting institutional capital, including Gnosis, which entered U.S. markets through a partnership with stablecoin startup Noah after the latter raised $22 million in seed funding.

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Crypto World

Bitcoin hits three-week low as $14B options expiry shakes bulls

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46% of Bitcoin supply now in loss, near 2022 bear levels

Bitcoin (BTC) extended its decline on Friday as traders reacted to the year’s largest options expiry and continued caution in crypto ETF flows. 

Summary

  • Bitcoin fell below $66,000 after $14 billion in options expired and ETF outflows persisted Friday.
  • Whale and retail wallets added Bitcoin in March even as price dropped and sentiment weakened.
  • Analyst XO said a drop toward $55,000 to $60,000 could set up longs in April.

Consequently, the drop pushed the asset to its lowest level in more than three weeks, even as some market signals pointed to rising accumulation and possible oversold conditions.

Bitcoin fell to as low as $65,500 on Friday, its weakest level since March 2. At the time of writing, BTC traded near $66,300, down 2% over 24 hours and 6% over the past week (per CoinGecko’s data).

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Meanwhile, the move came as roughly $14 billion in Bitcoin options expired, based on open interest. That expiry added pressure to an already cautious market and pushed traders toward a more defensive stance during the session.

ETF activity also remained in focus as investors continued pulling funds from spot Bitcoin products. Data showed that investors withdrew $171 million from spot ETFs on Thursday, adding to short-term pressure on price action.

Still, the broader monthly picture looked more balanced. March recorded about $1.4 billion in net inflows into Bitcoin ETFs after four straight months of net outflows, showing that demand had not fully disappeared despite the latest setback.

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While price remained under pressure, on-chain data pointed to continued buying from large holders and smaller wallets. According to Santiment, wallets holding between 10 and 10,000 BTC added 61,568 BTC over the past month, a 0.45% increase.

Smaller holders also showed similar behavior. Wallets with less than 0.01 BTC increased their balances by 0.42% over the same period, nearly matching the pace seen among whales and sharks.

Analysts watch for oversold bounce

Market watchers also pointed to oversold signals as Bitcoin traded well below its October 2025 all-time high above $126,000. Current pricing left BTC down 47.42% from that peak, while its market capitalization stood near $1.33 trillion.

Crypto analyst XO said March could mark only the second time Bitcoin posts six straight losing months if the month closes in the red. He wrote, 

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“If April sees an early sweep into the $55–60K range, it could create a compelling setup for mean-reversion longs.” 

He also said that the higher timeframe trend would stay in control unless a clear structural shift appears.

Disclosure: This article does not represent investment advice. The content and materials featured on this page are for educational purposes only.

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Senator Warren is Probing Bitmain over US Security Risks: Report

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Senator Warren is Probing Bitmain over US Security Risks: Report

Senator Elizabeth Warren has reportedly asked the US Commerce Department to explain how it is handling potential national security risks tied to Chinese crypto mining giant Bitmain, following previous reports that the firm has been under federal scrutiny.

In a letter sent Thursday to Commerce Secretary Howard Lutnick, Warren requested documents and communications related to Bitmain, which manufactures a large share of the world’s Bitcoin mining equipment, Bloomberg reported on Friday.

In November last year, it was reported that US authorities had launched an investigation into Bitmain over potential national security risks. The probe, known as “Operation Red Sunset” and led by the US Department of Homeland Security, aimed to examine whether Bitmain’s ASIC machines could be remotely accessed for espionage or used to disrupt the US power grid.

According to Bloomberg, the probe remains unresolved, and its current status is unclear. National security investigations of this type can run for years without public disclosure or legal action.

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Related: MARA sells $1.1B in Bitcoin to buy back debt at 9% discount

US scrutiny of Bitmain deepens

The scrutiny follows earlier actions, including halted shipments of Bitmain devices and a separate investigation into a related Chinese chip firm over alleged links to sanctioned Huawei.

In 2024, a federal review also flagged the use of its machines near a US military base as raising “significant national security concerns.”

Mining hardware market share is divided between three large manufacturers. Source: University of Cambridge

In July last year, Bloomberg also reported that Bitmain is preparing to open its first US-based ASIC manufacturing facility, with chip production expected to begin in early 2026 and scale by year-end.

Cointelegraph reached out to Warren and Bitmain for comment, but had not received a response by publication.

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Related: Bitcoin mining difficulty falls 7.7% as miner pressure persists

Trump-backed American Bitcoin buys Bitmain mining rigs

Bitmain’s machines are widely used in Bitcoin mining operations, including by American Bitcoin Corp., which counts Eric Trump and Donald Trump Jr. among its investors. The firm agreed last year to acquire 16,000 Bitmain rigs in a $314 million deal.

Warren’s letter also seeks details on any communications between Bitmain, the Trump family and Commerce officials, and asks what steps the department has taken to shield national security decisions from political influence.

Magazine: Bitcoin may take 7 years to upgrade to post-quantum — BIP-360 co-author

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