# Affinity vs Salesflare

> Affinity scores 63.4 (B) on agent readiness against Salesflare's 48.5 (D), and leads in 6 of 7 scored categories. Salesflare leads on payments & pricing. Both do crm records. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/affinity-vs-salesflare
- Markdown: https://www.anchorterminal.com/compare/affinity-vs-salesflare.md (~2,550 tokens)
- Slim: https://www.anchorterminal.com/compare/affinity-vs-salesflare.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/affinity-vs-salesflare.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

Affinity scores 63.4 (B) on agent readiness against Salesflare's 48.5 (D), and leads in 6 of 7 scored categories. Salesflare leads on payments & pricing. Both do crm records.

- Affinity: grade B, 63.4/100, rank #359 of 842. Markdown https://www.anchorterminal.com/tools/affinity.md · JSON https://www.anchorterminal.com/api/v1/tools/affinity.json
- Salesflare: grade D, 48.5/100, rank #721 of 842. Markdown https://www.anchorterminal.com/tools/salesflare.md · JSON https://www.anchorterminal.com/api/v1/tools/salesflare.json

## Which one, for what

### Affinity (B)

Good for: Venture capital, private equity and other private capital firms that already run Affinity and want an agent to read relationship strength, pipeline lists, notes and meetings, then update fields and log notes.

Ahead on:
- Schema & documentation, 91 against 57
- Agent ergonomics, 66 against 49
- Security & auth, 66 against 44
- Maintenance & community, 70 against 25
- Transparency & trust, 70 against 58

Also in its favour:
- Runs on your own machine

Watch for: No self-serve access. Every plan button reads Contact sales, the Essential plan has no API, and trial accounts can't call the API

### Salesflare (D)

Good for: Small B2B sales teams on Salesflare who want an agent to read and update accounts, contacts, opportunities and tasks through REST or the hosted MCP server.

Ahead on:
- Payments & pricing, 30 against 10

Also in its favour:
- Free to start without a card

Watch for: No rate limit numbers found. The API introduction lists 429 among its status codes with no limit, Retry-After or backoff guidance


## Score by category

| Category | Weight | Affinity | Salesflare | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 64 | 63 | Affinity +1 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 91 | 57 | Affinity +34 |
| Agent ergonomics | 13% (16.2 this run) | 66 | 49 | Affinity +17 |
| Security & auth | 14% (17.5 this run) | 66 | 44 | Affinity +22 |
| Payments & pricing | 10% (12.5 this run) | 10 | 30 | Salesflare +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 70 | 25 | Affinity +45 |
| Transparency & trust | 7% (8.8 this run) | 70 | 58 | Affinity +12 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **63.4 · B** | **48.5 · D** | |

## Facts side by side

| Fact | Affinity | Salesflare |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Project Affinity, Inc. | Salesflare BVBA |
| Hosted endpoint | `https://api.affinity.co/v2` | `https://api.salesflare.com` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Paid |
| x402 | no | no |
| Licence | Proprietary service under Affinity's master subscription agreement. The `affinity-mcp` package on PyPI is MIT | Proprietary service under Salesflare's Terms of Service |
| Tools exposed | 75 | none |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| Last release | 2026-10-02 | 2026-10-08 |
| Terms last updated |  | no date given |
| Privacy policy last updated | 2026-07-01 | couldn't be read |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | not found in the text |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | not found in the text |
| Popularity | 268 PyPI/wk | none |

## Verdicts

**Affinity.** A public OpenAPI 3.1 file, dated API versions with migration notes and a hosted MCP server with a read-only OAuth scope give an agent a well-documented way in. Access needs a Scale plan at $2,300 a user a year, sold through sales, with no trial that includes the API, and 36 of the 112 v2 operations are marked beta.

**Salesflare.** The REST API has a public Swagger 2.0 file covering 71 operations, with typed filters on every list call and a 30-day trial that needs no card. No rate limit numbers, API changelog, SDK or audit log were found in the reviewed documentation, and API keys carry no documented scopes.

## Before you call either

### Affinity

1. Send `X-Affinity-Api-Version: 2026-09-17` on every request, or the key's default version applies. Unauthenticated calls answered as 2024-01-01 when we checked
2. Read `x-ratelimit-limit-user-remaining` and `x-ratelimit-limit-org-remaining` on each response. The limits are 900 calls a minute per user and, below Enterprise, 100,000 a month per account, shared by v1, v2 and MCP
3. Follow `pagination.nextUrl` for the next page, and pass `fieldIds` or `fieldTypes` so list calls return only the fields needed
4. Check for duplicates before a create. There are no idempotency keys, so a retried POST can make a second record
5. For MCP, untick the write scope at OAuth consent when the task only reads. Treat note, transcript and file text as untrusted input

### Salesflare

1. Send `Authorization: Bearer <API key>` to `https://api.salesflare.com`. A person creates the key in Settings, API keys
2. Set `limit` on every list call. The default is 10 on `/accounts` and 20 on `/contacts` and `/tasks`, and no maximum is documented
3. Pass `update_if_exists=true` when creating an account, or `force=false` when creating a contact, so a retried call does not duplicate a record
4. Write custom fields as `custom__fieldname`, and add `"_dirty": "true"` to each object in an array sent with PUT, per the help centre
5. Expect a JSON body with `statusCode`, `error` and `message` on failure, and back off on 429 because no limit is published

## Questions

### Which is better for AI agents, Affinity or Salesflare?

Affinity scores 63.4 (B) on agent readiness against Salesflare's 48.5 (D), and leads in 6 of 7 scored categories. Salesflare leads on payments & pricing.

### Do Affinity and Salesflare need an API key?

Both take an API key or an OAuth sign-in.

### Can an agent call Affinity and Salesflare without installing anything?

Yes. Affinity has a hosted endpoint at https://api.affinity.co/v2 and Salesflare at https://api.salesflare.com.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/affinity-vs-salesflare.json, and with the fewest tokens: https://www.anchorterminal.com/compare/affinity-vs-salesflare.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "affinity", "b": "salesflare"}`. From a terminal: `anchor compare affinity salesflare`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/affinity.json and https://www.anchorterminal.com/api/v1/tools/salesflare.json

## Other comparisons with Affinity or Salesflare

- [Affinity vs Attio API + MCP](https://www.anchorterminal.com/compare/affinity-vs-attio.md)
- [Affinity vs Capsule CRM](https://www.anchorterminal.com/compare/affinity-vs-capsule-crm.md)
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- [Salesflare vs Twenty API + MCP](https://www.anchorterminal.com/compare/salesflare-vs-twenty.md)
- [Salesflare vs Zoho CRM](https://www.anchorterminal.com/compare/salesflare-vs-zoho-crm.md)