There is no dedicated statute in India that governs founders' agreements by name. They draw their force from the Indian Contract Act, 1872, and are valid and enforceable the moment they satisfy the four conditions of a sound contract: offer, acceptance, lawful consideration and free consent. Because the agreement is a contract between the signatories, it binds them as a matter of private law even though it is never filed with the Registrar of Companies. That contractual character is what makes vesting, leaver terms, confidentiality and IP assignment enforceable between the founders.
Several other statutes shape specific clauses. India's intellectual property laws, principally the Copyright Act, 1957, the Patents Act, 1970 and the Trade Marks Act, 1999, recognise the IP assignment that transfers founder-created work to the company. This assignment matters more than founders expect: under settled principle, an independent creator keeps ownership of their work unless it is expressly assigned, so without a clause the company may not own its own product. The Companies Act, 2013 governs the entity itself and overrides any conflicting private term once the company exists. Where a foreign founder or cross-border equity is involved, FEMA, 1999 applies, and equity transfers can carry consequences under the Income Tax Act, 1961.
The clause that catches the most founders is non-compete. Section 27 of the Indian Contract Act, 1872, voids any agreement that restrains a person from carrying on a lawful trade or profession. A blanket post-exit non-compete is therefore unenforceable. The line drawn by the Supreme Court in Niranjan Shankar Golikari v. Century Spinning and Manufacturing Co. Ltd. (1967) is that a restraint operating during the engagement is valid where reasonable and necessary to protect the business, while a restraint operating after a founder leaves generally is not. Confidentiality and reasonably scoped non-solicitation clauses survive this test far better than a bare non-compete. The official text of the Act is published on the India Code repository of the Indian Contract Act 1872.
The other formality is stamping. Under the Indian Stamp Act, 1899, the agreement should be executed on stamp paper of the value applicable in the relevant state. Stamp duty is a state subject, so the amount differs across India, and an unstamped or under-stamped agreement is not admissible as evidence in court until the duty and any penalty are paid. Registration with a government body is not mandatory.