Amazon DynamoDB vs PostgreSQL
One of fourteen models named Amazon DynamoDB first on the direct prompt; zero named PostgreSQL. Amazon DynamoDB was named by fourteen of the fourteen models and PostgreSQL by nine and Amazon DynamoDB carries 67 labels and PostgreSQL 11, so the shares are not directly comparable.
Named in three categories this edition.
Named in six categories this edition.
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; every quote names the model and the prompt it came from. Both figures come from the nosql databases page.
By framing
Amazon DynamoDBFirst choices, of fourteen modelsPostgreSQL
Across every category in the October 2026 Edition, Amazon DynamoDB and PostgreSQL were named in the same answer thirty-seven times, of the 188 answers naming Amazon DynamoDB and the 106 naming PostgreSQL. In those answers PostgreSQL took the first choice eight times and Amazon DynamoDB seven.
Every model, every framing
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | | ||||
| GPT-5.4 mini | | | | |||
| Gemini 3.5 Flash | | | | | | |
| Perplexity Sonar | | | | | | |
| Grok 4.1 Fast | | | | | ||
| Mistral Small | | | | | ||
| DeepSeek V4 Flash | | | | | | |
| Llama 4 Maverick | | |||||
| Qwen 3.7 Flash | | | | | ||
| Kimi K2 | | | | | | |
| GLM 4.7 FlashX | | | | |||
| MiniMax M2.5 | | | | | ||
| GPT-6 Luna | | | | | | |
| Muse Glimmer 30B | | | | | |
Amazon DynamoDB PostgreSQL first choice named as an alternative argued againstblank: not namedEach cell is one answer, Amazon DynamoDB on the left and PostgreSQL on the right.The direct prompt
Amazon DynamoDB first, PostgreSQL not the choice
1 of 14 modelsPostgreSQL was named in the answer but not as the choice, or not at all.Neither was the first choice, one was named
11 of 14 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
2 of 14 modelsThe answer made no first choice from these two in this category.Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
By buyer segment
Amazon DynamoDB11%#2 of 10PostgreSQL5%#4 of 10Amazon DynamoDB11%#2 of 13PostgreSQL2%#6 of 13Amazon DynamoDB16%#2 of 9PostgreSQL0%#– of 9What the models said about Amazon DynamoDB
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Avoid DynamoDB as a primary application database unless your use case is a clean fit for key-value patterns” Kimi K2 · direct prompt · hard negative
“Avoid DynamoDB unless you are deeply invested in AWS” GLM 4.7 FlashX · paraphrase prompt · hard negative
“AWS guidance says to avoid large items, reads on non-key attributes, and scans, which means it can be a poor fit if your access pattern is not key-centric” Perplexity Sonar · negative prompt · soft negative
“I'd typically recommend starting with a managed document database (MongoDB Atlas or DynamoDB) if you want flexibility” Claude Haiku 4.5 · paraphrase prompt · first choice
“DynamoDB is a pragmatic default because it gives you managed key-value performance with document-style JSON values” Muse Glimmer 30B · paraphrase prompt · first choice
“Amazon DynamoDB – #1 of 31 tools in a 2026 round-up, and listed as best managed key-value at scale” Muse Glimmer 30B · comparative prompt · first choice
What the models said about PostgreSQL
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of three in this category shown.
“Before choosing any NoSQL database, ask yourself: "Why can't I use PostgreSQL?"” Gemini 3.5 Flash · negative prompt · first choice
“If your data is highly normalized and relational ... stick to Postgres.” Qwen 3.7 Flash · scale prompt · first choice
“modern trends suggest looking at PostgreSQL (specifically with JSONB) as the ultimate hybrid solution” Qwen 3.7 Flash · direct prompt · alternative
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.