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SAFE Side Letter Agreement

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SAFE SIDE LETTER AGREEMENT

This SAFE Side Letter Agreement (this "Side Letter") is made as of by and between Company Name: , a ("Company"), and Investor Name: ("Investor"). This Side Letter supplements and modifies certain rights granted to Investor under the SAFE described below.

RECITALS

WHEREAS, on or about the Company and the Investor entered into a Simple Agreement for Future Equity (the "SAFE") pursuant to which Investor invested the sum of in consideration for the rights set forth in the SAFE;

WHEREAS, the parties desire to set forth certain additional terms and clarifications that modify or supplement the SAFE solely as set forth in this Side Letter; and

WHEREAS, capitalized terms used but not defined in this Side Letter shall have the meanings given to them in the SAFE, unless otherwise defined herein.

NOW, THEREFORE, in consideration of the mutual covenants and agreements contained herein and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereby agree as follows:

1. PURPOSE

The purpose of this Side Letter is to confirm and set forth certain additional rights and procedural provisions with respect to the SAFE that are binding between the Company and the Investor. This Side Letter is not intended to create any rights in favor of any third party not a party hereto.

2. DEFINITIONS

For purposes of this Side Letter, the following additional definitions apply: "Pro Rata Rights" means the right, but not the obligation, of Investor to purchase its Pro Rata Percentage of New Securities in future equity financings as set forth in Section 3. "Confidential Information" has the meaning ascribed to that term in Section 7 below.

3. ADDITIONAL INVESTOR RIGHTS

3.1 Pro Rata Rights. The Company hereby grants to Investor the right to participate in future issuances of equity securities of the Company pursuant to the following: Investor may elect to purchase up to of any New Securities offered in a Qualified Financing, at the same price and on substantially the same terms as such New Securities are offered to other investors. To exercise this right, Investor must deliver written notice of election to the Company within days after receipt of the Company's notice of the proposed sale.

3.2 Information Rights. For so long as Investor holds the SAFE or any securities issued upon conversion thereof, the Company shall provide Investor with the following information: (a) annual audited financial statements within days after fiscal year-end; (b) quarterly unaudited financial statements within days after quarter-end; and (c) prompt notice of any material adverse event that would reasonably be expected to materially impair the business, financial condition, or operations of the Company.

3.3 Most-Favored-Nation. If, prior to the Conversion or termination of the SAFE, the Company issues a material amendment or grant of rights to another investor that is more favorable than the rights provided to Investor under the SAFE, then, upon written request by Investor given within days after Investor's knowledge of such amendment or grant, the Company shall extend the benefit of such more favorable economics to Investor with retroactive effect to the extent possible under applicable law.

4. TREATMENT OF SAFE

4.1 Priority and Non-Contradiction. Except as expressly modified by this Side Letter, all terms of the SAFE remain in full force and effect. In the event of any conflict between the terms of this Side Letter and the SAFE, the terms of this Side Letter shall control solely with respect to the matters addressed herein.

4.2 No Separate Security. This Side Letter does not constitute an amendment to the principal amount, conversion mechanics, valuation cap, or discount in the SAFE except where expressly stated herein. Any amendment to the financial terms of the SAFE shall be made only by a written amendment signed by both parties.

5. REPRESENTATIONS AND WARRANTIES

5.1 Company Representations. The Company represents and warrants to Investor that (a) it is duly organized, validly existing and in good standing under the laws of the jurisdiction of its organization; (b) the execution, delivery and performance of this Side Letter are within the Company's corporate powers and have been duly authorized; and (c) this Side Letter constitutes a valid and binding obligation of the Company enforceable in accordance with its terms.

5.2 Investor Representations. Investor represents and warrants to the Company that (a) it has full power and authority to execute and deliver this Side Letter and to perform its obligations hereunder; (b) it is acquiring the rights hereunder for investment purposes and not with a view to distribution in violation of applicable securities laws; and (c) all information provided by Investor to the Company in connection with the SAFE and this Side Letter is true and correct in all material respects.

6. CONFIDENTIALITY

The parties agree that the terms of this Side Letter and any non-public information disclosed in connection with the SAFE and this Side Letter shall be kept confidential and shall not be disclosed to any third party except (a) as required by law or legal process, (b) to the parties' professional advisors on a need-to-know basis, or (c) with the prior written consent of the other party. For avoidance of doubt, disclosure to existing or prospective investors by the Company relating to terms substantially similar to those in this Side Letter shall not constitute a breach if such investors agree to confidentiality obligations.

7. NOTICES

All notices, requests, consents, claims, demands, waivers and other communications hereunder shall be in writing and addressed to the parties at their respective addresses set forth below (or at such other address for a party as shall be specified in a written notice delivered in accordance with this Section).

8. AMENDMENTS; WAIVER

Except as expressly provided herein, this Side Letter may be amended, supplemented or otherwise modified only by a written instrument executed by both the Company and Investor. No failure or delay by any party in exercising any right, power or privilege hereunder shall operate as a waiver thereof, nor shall any single or partial exercise of any such right preclude any other or further exercise thereof.

9. COUNTERPARTS; ELECTRONIC SIGNATURES

This Side Letter may be executed in counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. Execution and delivery of this Side Letter by electronic signature shall be valid and effective to bind the parties to the same extent as an original signature.

10. GOVERNING LAW

This Side Letter shall be governed by and construed in accordance with the laws of the State of without regard to principles of conflicts of law. Each party irrevocably submits to the exclusive jurisdiction of the state and federal courts located in the county of for the purpose of any suit, action or other proceeding arising out of or relating to this Side Letter.

11. ENTIRE AGREEMENT

This Side Letter, together with the SAFE and any documents expressly referenced herein, constitutes the entire agreement between the parties with respect to the subject matter hereof and supersedes all prior and contemporaneous agreements, representations and understandings of the parties, whether written or oral, relating to such subject matter.

12. SEVERABILITY

If any provision of this Side Letter is held to be illegal, invalid or unenforceable under present or future laws effective during the term of this Side Letter, such provision shall be fully severable, and this Side Letter shall be construed and enforced as if such illegal, invalid or unenforceable provision had never comprised a part hereof. The remaining provisions of this Side Letter shall remain in full force and effect.

13. MISCELLANEOUS

13.1 Binding Effect. This Side Letter shall be binding upon and inure to the benefit of the parties and their respective successors and permitted assigns. Investor may not assign this Side Letter without the prior written consent of the Company, except to a permitted transferee in accordance with the terms of the SAFE.

13.2 No Third-Party Beneficiaries. Nothing in this Side Letter, express or implied, is intended to confer upon any person other than the parties hereto and their respective successors and permitted assigns any rights, remedies, obligations or liabilities under or by reason of this Side Letter.

SIGNATURES

The parties have executed this Side Letter as of the date first written above.

Company Name:

By:

Date:

Investor Name:

By:

Date:

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What a SAFE Side Letter Agreement Is and When It’s Used

A SAFE Side Letter Agreement is a supplemental, standalone contract that modifies or clarifies specific terms of a Simple Agreement for Future Equity (SAFE) without rewriting the entire SAFE. Side letters are commonly used to document special rights, exceptions, or procedural clarifications for a particular investor or limited group of investors, such as preferential conversion mechanics, information rights, confidentiality covenants, transfer restrictions, or deadlines. Legally it functions as an amendment or an ancillary agreement that must be signed by the relevant parties to be effective and should be cross‑referenced to the parent SAFE and any related capitalization records.

Why a Side Letter Can Be Important for a SAFE

A SAFE Side Letter provides precision and flexibility: it memorializes negotiated exceptions, reduces ambiguity about investor privileges, and helps prevent disputes by recording agreed departures from standard SAFE language. It can preserve the main SAFE while tailoring discrete terms for specific investors.

Why a Side Letter Can Be Important for a SAFE

Typical Parties Who Prepare or Sign a SAFE Side Letter

Ensure each listed party signs and dates the side letter and that corporate authorization or board approval is documented where required.

  • Startup founders and company counsel preparing tailored investor accommodations during fundraising or bridging rounds.
  • Angel investors or lead investors whose negotiated rights differ from other SAFE holders.
  • Corporate or institutional counsel reviewing effects on conversion, information rights, or downstream financings.

Core Elements to Include in a Professional SAFE Side Letter

A concise side letter should clearly identify scope, affected SAFE provisions, and duration; it should include any procedures for notice, recordkeeping, and dispute resolution to avoid uncertainty during future financings.

Parties

Identify the company and the investor(s) by full legal name and entity type, including any parent or affiliate that will rely on the letter; include jurisdiction of organization.

Effective Date

State the exact effective date of the side letter and whether it applies retroactively to the SAFE execution date or only prospectively to future events.

Amendment Scope

Specify which SAFE clauses are modified or supplemented, using exact SAFE section references and clear cross‑references to exhibit or schedule numbers.

Conversion Mechanics

If conversion price, cap, discount, or valuation treatment changes, set out precise formulas, rounding rules, and triggering events to avoid differing interpretations.

Confidentiality

Include any confidentiality obligations relating to the side letter terms and define permitted disclosures for financing or regulatory purposes.

Signatures & Authorization

Provide signature blocks for authorized signatories, include corporate resolution references if required, and note whether notarization or counterparty witness is requested.

Step-by-Step: How to Draft and Execute a SAFE Side Letter

Follow a simple sequence to limit risk: prepare draft, confirm authority, obtain signatures, update records, and distribute executed copies.

  • 01
    Draft the Letter: Describe changes, cite SAFE sections, and keep language precise to avoid ambiguity.
  • 02
    Obtain Approvals: Confirm board or authorized signatory approval per corporate governance rules.
  • 03
    Execute Properly: Have authorized signatories sign and date; consider notarization only if required or requested.
  • 04
    Update Records: Record the side letter in the cap table and investor files; notify transfer agents if needed.

How to Configure an Online Signing Workflow for a Side Letter

Set up a reproducible template and authentication steps to speed execution while preserving auditability.

Field Configuration
Signer Authentication Email link plus optional SMS code for two‑factor verification
Signature Type Allow drawn signature or click-to-sign with timestamped audit trail
Conditional Fields Use conditional visibility for investor-specific clauses and exhibits
Template Storage Save as reusable template linked to the SAFE master file

Where to Send Executed Side Letters and Who Should Receive Copies

Distribution should ensure corporate records, investors, and advisors have identical executed copies for future reference.

  • Deliver to Investor: Provide the investor with a fully executed PDF copy for their records
  • Company Records: File the signed side letter in the corporate minute book and investor folder
  • Cap Table Update: Record any conversion or preference changes in the cap table immediately
  • Counsel and Accountant: Share with legal and tax advisors for compliance and tax reporting

Digital Signing Requirements and Common Platform Integrations

Ensure the chosen platform supports ESIGN/UETA compliance, secure encryption in transit and at rest, and provides an exportable audit trail suitable for legal review.

  • File Format: Use PDF/A or PDF to preserve formatting
  • Integrations: Connect to cap table tools, Google Drive, or NetSuite for record sync
  • Authentication: Enable email + optional SMS or KBA for higher assurance

Typical Timing and Delivery Expectations for a Side Letter

Set clear deadlines for negotiation, execution, delivery, and any conditionally triggered obligations to avoid disputes about timing.

Negotiation Window:

Agree on a finite negotiation period, commonly 3–10 business days

Execution Deadline:

Require signing within an agreed number of days after final draft delivery

Delivery of Executed Copy:

Deliver executed PDF within 5 business days after signatures

Cap Table Update Timing:

Update cap table immediately upon execution or within agreed timeframe

Condition Precedent Deadline:

If conditional, set a clear date for satisfaction or waiver

Key Milestones From Draft to Recordation

Track milestones to ensure enforceability: drafting, approval, signature, and recording or internal filing.

01

Draft Completion

Finalize side letter language and internal review

02

Board or Counsel Approval

Obtain required corporate approvals before signing

03

Execution

Signatures obtained from authorized representatives

04

Corporate Filing

File executed copy in minute book and update cap table

Common Mistakes to Avoid When Preparing a Side Letter

  • Using vague language instead of quoting precise SAFE sections, which creates interpretive disputes and downstream ambiguity during financings.
  • Failing to confirm signatory authority or board approval, potentially rendering the side letter void or unenforceable under corporate law.
  • Neglecting to update the cap table and investor records immediately, causing inaccurate ownership data during subsequent transactions.
  • Requesting notarization without understanding state RON or notary rules, which can delay execution and add unnecessary costs.

Risks and Consequences of an Incorrect or Missing Side Letter

Breach Risk: Potential contract breach and damages
Tax Implications: Unclear tax treatment or reporting issues
Cap Table Errors: Incorrect ownership percentages recorded
Invalid Amendment: Risk the modification is unenforceable
Investor Dispute: Increased litigation or arbitration risk
Execution Delays: Delayed closings and funding schedules

Security and Compliance Items to Include or Check

TLS Encryption: TLS 1.2/1.3 in transit
Data at Rest: AES-256 encryption at rest
Audit Trail: Detailed timestamps, IP, and action log
HIPAA Support: BAA available if PHI involved
SOC 2: SOC 2 Type II certified
ESIGN / UETA: Compliant with ESIGN and UETA

eSignature Vendor Comparison for Executing SAFE Side Letters

Compare core pricing and features that matter for investor agreements; signNow appears first per platform comparison standards.

signNow DocuSign Adobe Sign PandaDoc HelloSign
Starting Price $8/user/mo $15/user/mo $14/user/mo $19/user/mo $15/user/mo
Free Trial Yes, 7-day trial Varies Varies Varies Varies
Bulk Send Yes (Premium) Yes Yes Yes No
Audit Trail Yes Yes Yes Yes Yes
HIPAA Compliant Yes Yes Yes No No

Frequently Asked Questions About SAFE Side Letter Agreements

Answers to common questions help ensure a signed side letter is effective, accurately recorded, and enforceable under electronic signing laws.


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