# BigTime vs Accelo: which do AI models recommend for PSA, October 2026

Finance AI Recommendation Index, October 2026 Edition, Professional services automation. Three of fourteen models named BigTime first on the direct prompt; zero named Accelo. Page: https://finance-ai-index.com/receivables/professional-services-automation/bigtime-vs-accelo/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| BigTime | 29% | #1 of 10 | 4% | 48 | 14 of 14 |
| Accelo | 4% | #6 of 10 | 4% | 25 | 12 of 14 |

## The direct prompt, model by model

- Grok 4.1 Fast: bigtime first (first choices: BigTime) (alternatives: Accelo, Autotask, Kantata, Scoro)
- DeepSeek V4 Flash: bigtime first (first choices: BigTime) (alternatives: Accelo, Certinia PS Cloud, Kantata, Scoro)
- Kimi K2: bigtime first (first choices: BigTime, Kantata) (alternatives: Accelo, Certinia Professional Services Cloud, Scoro)
- Claude Haiku 4.5: neither first, one named (first choices: Kantata) (alternatives: Accelo, BigTime, Certinia Professional Services Cloud, Scoro)
- Perplexity Sonar: neither first, one named (first choices: Kantata) (alternatives: Accelo, Birdview, Rocketlane, Ruddr)
- Qwen 3.7 Flash: neither first, one named (first choices: Kantata) (alternatives: Accelo, Scoro)
- GLM 4.7 FlashX: neither first, one named (first choices: Kantata) (alternatives: BigTime, Scoro)
- GPT-6 Luna: neither first, one named (first choices: Kantata OX) (alternatives: BigTime, Certinia Professional Services Cloud, Rocketlane)
- GPT-5.4 mini: neither named (first choices: Kantata) (alternatives: Certinia Professional Services Cloud, Productive, Scoro)
- Gemini 3.5 Flash: neither named (first choices: Rocketlane) (alternatives: Certinia Professional Services Cloud, Kantata, Scoro)
- Mistral Small: neither named (first choices: Kantata, Rocketlane) (alternatives: SAP S/4HANA)
- Llama 4 Maverick: neither named (first choices: Kantata) (alternatives: Scoro)
- MiniMax M2.5: neither named (first choices: Kantata) (alternatives: Avaza, Certinia Professional Services Cloud, Rocketlane, Upland PSA)
- Muse Glimmer 30B: neither named (first choices: Kantata) (alternatives: Birdview, Deltek Vantagepoint, Scoro)

## What the models said about BigTime

- "BigTime is compatible with QuickBooks but not 100%, with a lot of work still to be done in that area" (Claude Haiku 4.5, negative prompt, soft negative)
- "Productive advises skipping it if you are heading past 50 billable staff." (Perplexity Sonar, negative prompt, soft negative)
- "the most highly recommended PSA tool for a mid-sized B2B company focused specifically on project billing and utilization is BigTime" (Qwen 3.7 Flash, paraphrase prompt, first choice)
- "Teamwork.com from ~$9.99/user/mo and BigTime Essentials from ~$20/user/mo are the most frequently cited budget-friendly options" (Muse Glimmer 30B, budget prompt, first choice)
- "BigTime and Accelo are top recommendations due to their strong billing, utilization, and project management features" (Mistral Small, paraphrase prompt, first choice)

## What the models said about Accelo

- "Some users report slow onboarding, poor support, and billing issues" (Claude Haiku 4.5, negative prompt, soft negative)
- "I'd recommend starting with BigTime or Accelo" (MiniMax M2.5, paraphrase prompt, first choice)
- "BigTime and Accelo are top recommendations" (Mistral Small, paraphrase prompt, first choice)
- "Best for: Small-to-midsize boutique services firms looking for a "quote-to-cash" automated workflow." (Gemini 3.5 Flash, comparative prompt, alternative)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.