# KX, Milvus, Amazon Redshift vs Weaviate Comparison | | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Star Rating** | 4.6 out of 5 | 4.7 out of 5 | 4.3 out of 5 | 4.6 out of 5 | | **Total Reviews** | 51 | 12 | 401 | 29 | | **Largest Market Segment** | Enterprise (58.0% of reviews) | Small-Business (45.5% of reviews) | Mid-Market (39.9% of reviews) | Small-Business (75.9% of reviews) | | **Entry Level Price** | $0.00 | Free | $1.22 - $3.26 Per hour | Free | --- ## Top Pros & Cons ### KX Pros: - Speed (11 reviews) - Performance (9 reviews) Cons: - Learning Curve (12 reviews) - Difficult Learning (7 reviews) ### Milvus **Not enough data** ### Amazon Redshift Pros: - Ease of Use (7 reviews) - Integrations (7 reviews) Cons: - Complexity (5 reviews) - Feature Limitations (5 reviews) ### Weaviate **Not enough data** --- ## Ratings Comparison | Rating | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Meets Requirements** | 8.9 (35 reviews) | 9.1 (11 reviews) | 8.7 (284 reviews) | 8.8 (27 reviews) | | **Ease of Use** | 6.7 (38 reviews) | 8.5 (11 reviews) | 8.7 (284 reviews) | 9.0 (28 reviews) | | **Ease of Setup** | 8.5 (24 reviews) | 7.5 (10 reviews) | 8.6 (141 reviews) | 8.6 (20 reviews) | | **Ease of Admin** | 8.9 (14 reviews) | 8.6 (7 reviews) | 8.4 (129 reviews) | 8.8 (12 reviews) | | **Quality of Support** | 8.7 (33 reviews) | 8.7 (10 reviews) | 8.5 (267 reviews) | 8.6 (26 reviews) | | **Has the product been a good partner in doing business?** | 9.0 (12 reviews) | 9.0 (7 reviews) | 8.7 (128 reviews) | 8.5 (11 reviews) | | **Product Direction (% positive)** | 8.6 (42 reviews) | 10.0 (11 reviews) | 8.9 (255 reviews) | 9.2 (28 reviews) | --- ## Pricing ### KX #### Entry-Level Pricing Plan: Free Price: $0.00 Description: Rate-limited plan for quickly and easily getting started with kdb+. Key Features: - Fastest query speed ​ - In-memory compute engine​ - Extreme scalability ​ [Browse all 3 editions](https://www.g2.com/products/kx-kx/pricing) #### Free Trial Yes ### Milvus #### Entry-Level Pricing Plan: Free & Open Source Price: Free Description: Milvus is open source software and free to use under the Apache 2.0 license. To learn more, visit: https://github.com/milvus-io/milvus/blob/master/LICENSE Key Features: - Easy to use - Blazing fast - Highly available [Learn more about Milvus](https://www.g2.com/products/milvus/reviews) #### Free Trial Yes ### Amazon Redshift #### Entry-Level Pricing Plan: RA3.4xlarge Price: $1.22 - $3.26 Per hour Description: On-demand, 1-Year, or 3-Year Terms Key Features: - Commit to save up to 34% [Browse all 6 editions](https://www.g2.com/products/amazon-redshift/pricing) #### Free Trial Yes ### Weaviate #### Entry-Level Pricing Plan: Self-Deployed Price: Free Description: Weaviate is an open-source vector database that simplifies the development of AI applications. Built-in vector and hybrid search, easy-to-connect machine learning models, and a focus on data privacy enable developers of all levels to build, iterate, and scale AI capabilities faster. Key Features: - Open-source, developer-friendly AI platform - Connect with 20+ ML model integrations - Combine vector and keyword searches seamlessly [Browse all 4 editions](https://www.g2.com/products/weaviate/pricing) #### Free Trial Yes --- ## Features Comparison By Category ### Data Warehouse | Product | Score | Reviews | |---|---|---| | **KX** | N/A | N/A | | **Milvus** | N/A | N/A | | **Amazon Redshift** | 8.4/10 | 150 | | **Weaviate** | N/A | N/A | #### Data Management | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Data Integration** | Not enough data | Not enough data | 8.8 (135 reviews) ✓ Verified | Not enough data | | **Data Compression** | Not enough data | Not enough data | 8.4 (125 reviews) ✓ Verified | Not enough data | | **Data Quality** | Not enough data | Not enough data | 8.8 (131 reviews) ✓ Verified | Not enough data | | **Built-In Data Analytics** | Not enough data | Not enough data | 8.0 (127 reviews) ✓ Verified | Not enough data | | **In-Database Machine Learning** | Not enough data | Not enough data | 7.6 (102 reviews) ✓ Verified | Not enough data | | **Data Lake Analytics** | Not enough data | Not enough data | 8.3 (119 reviews) ✓ Verified | Not enough data | #### Integration | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **AI/ ML Integration** | Not enough data | Not enough data | 7.9 (101 reviews) ✓ Verified | Not enough data | | **BI Tool Integration** | Not enough data | Not enough data | 8.7 (129 reviews) ✓ Verified | Not enough data | | **Data lake Integration** | Not enough data | Not enough data | 8.6 (119 reviews) ✓ Verified | Not enough data | #### Deployment | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **On-Premise** | Not enough data | Not enough data | 8.1 (102 reviews) | Not enough data | | **Cloud** | Not enough data | Not enough data | 8.9 (131 reviews) ✓ Verified | Not enough data | #### Performance | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Scalability** | Not enough data | Not enough data | 8.9 (136 reviews) ✓ Verified | Not enough data | #### Security | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Data Governance** | Not enough data | Not enough data | 8.7 (126 reviews) ✓ Verified | Not enough data | | **Data Security** | Not enough data | Not enough data | 8.8 (128 reviews) ✓ Verified | Not enough data | #### Generative AI | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **AI Text Generation** | Not enough data | Not enough data | 7.3 (20 reviews) | Not enough data | | **AI Text Summarization** | Not enough data | Not enough data | 7.2 (19 reviews) | Not enough data | ### Columnar Databases | Product | Score | Reviews | |---|---|---| | **KX** | 8.4/10 | 22 | | **Milvus** | N/A | N/A | | **Amazon Redshift** | 8.3/10 | 63 | | **Weaviate** | N/A | N/A | #### Storage | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Data Model** | 8.8 (20 reviews) | Not enough data | 8.4 (53 reviews) | Not enough data | | **Data Types** | 9.5 (22 reviews) | Not enough data | 8.4 (56 reviews) | Not enough data | #### Availability | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Auto Sharding** | 7.9 (14 reviews) | Not enough data | 8.6 (47 reviews) | Not enough data | | **Auto Recovery** | 7.6 (16 reviews) | Not enough data | 8.2 (50 reviews) | Not enough data | | **Data Replication** | 9.0 (16 reviews) | Not enough data | 8.4 (48 reviews) | Not enough data | #### Performance | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Integrated Cache** | 9.1 (17 reviews) | Not enough data | 8.2 (48 reviews) | Not enough data | #### Security | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Role-Based Authorization** | 8.0 (15 reviews) | Not enough data | 8.7 (47 reviews) | Not enough data | | **Authentication** | 7.9 (18 reviews) | Not enough data | 8.4 (52 reviews) | Not enough data | | **Audit Logs** | 7.7 (14 reviews) | Not enough data | 8.1 (47 reviews) | Not enough data | | **Encryption** | 8.2 (16 reviews) | Not enough data | 8.5 (48 reviews) | Not enough data | #### Support | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Multi-Model** | 7.7 (11 reviews) | Not enough data | 7.9 (43 reviews) | Not enough data | | **Operating Systems** | 9.1 (16 reviews) | Not enough data | 8.5 (47 reviews) | Not enough data | ### Vector Database | Product | Score | Reviews | |---|---|---| | **KX** | 8.7/10 | 10 | | **Milvus** | 9.0/10 | 7 | | **Amazon Redshift** | N/A | N/A | | **Weaviate** | 8.7/10 | 26 | #### Data Indexing | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Semantic Search** | 8.0 (9 reviews) | Not enough data | Not enough data | 8.8 (26 reviews) | | **Indexing Data** | 9.3 (10 reviews) | 9.0 (5 reviews) | Not enough data | 8.6 (26 reviews) | #### Filters | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Accurate Search** | 8.5 (10 reviews) | 9.0 (5 reviews) | Not enough data | 8.7 (25 reviews) | | **Single Stage Filtering - Vector Database** | 9.1 (9 reviews) | Not enough data | Not enough data | 8.7 (26 reviews) | ### Real-time Analytic Database | Product | Score | Reviews | |---|---|---| | **KX** | 8.3/10 | 10 | | **Milvus** | N/A | N/A | | **Amazon Redshift** | N/A | N/A | | **Weaviate** | N/A | N/A | #### Query latency | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Lower query latency** | 8.8 (10 reviews) | Not enough data | Not enough data | Not enough data | | **Continuous queries** | 8.3 (9 reviews) | Not enough data | Not enough data | Not enough data | #### Data latency | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Lower data latency** | 8.9 (9 reviews) | Not enough data | Not enough data | Not enough data | | **Data pipeline performance** | 8.0 (9 reviews) | Not enough data | Not enough data | Not enough data | #### Connectors | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Faster ingestion** | 8.0 (9 reviews) | Not enough data | Not enough data | Not enough data | | **Built-in connectors** | 7.0 (9 reviews) | Not enough data | Not enough data | Not enough data | #### Scale | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Linearly scalable database** | 8.9 (9 reviews) | Not enough data | Not enough data | Not enough data | | **Storage management** | 8.3 (10 reviews) | Not enough data | Not enough data | Not enough data | #### Architecture | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Data security** | 8.1 (9 reviews) | Not enough data | Not enough data | Not enough data | | **Lockless architecture** | 8.3 (9 reviews) | Not enough data | Not enough data | Not enough data | ### AWS Marketplace | Product | Score | Reviews | |---|---|---| | **KX** | N/A | N/A | | **Milvus** | N/A | N/A | | **Amazon Redshift** | N/A | N/A | | **Weaviate** | N/A | N/A | #### Agentic AI - AWS Marketplace | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | Not enough data | Not enough data | | **Multi-step Planning** | Not enough data | Not enough data | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | Not enough data | Not enough data | ### AI Search & Retrieval Infrastructure Platforms | Product | Score | Reviews | |---|---|---| | **KX** | N/A | N/A | | **Milvus** | N/A | N/A | | **Amazon Redshift** | N/A | N/A | | **Weaviate** | N/A | N/A | #### Retrieval intelligence - AI Search & Retrieval Infrastructure Platforms | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Advanced relevance tuning** | Not enough data | Not enough data | Not enough data | Not enough data | | **Query understanding & expansion** | Not enough data | Not enough data | Not enough data | Not enough data | | **Multistage retrieval & re-ranking** | Not enough data | Not enough data | Not enough data | Not enough data | | **Context-aware & personalized search** | Not enough data | Not enough data | Not enough data | Not enough data | #### Embedding & model management - AI Search & Retrieval Infrastructure Platforms | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Embedding versioning & lifecycle management** | Not enough data | Not enough data | Not enough data | Not enough data | | **Multimodal search support** | Not enough data | Not enough data | Not enough data | Not enough data | | **Pluggable embedding & LLM providers** | Not enough data | Not enough data | Not enough data | Not enough data | #### LLM retrieval & RAG optimization - AI Search & Retrieval Infrastructure Platforms | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Retrieval pipeline orchestration** | Not enough data | Not enough data | Not enough data | Not enough data | | **LLM-aware retrieval optimization** | Not enough data | Not enough data | Not enough data | Not enough data | | **Hybrid retrieval strategy optimization** | Not enough data | Not enough data | Not enough data | Not enough data | #### Data Enrichment & Index Intelligence - AI Search & Retrieval Infrastructure Platforms | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Incremental & streaming index updates** | Not enough data | Not enough data | Not enough data | Not enough data | | **Built-in data enrichment** | Not enough data | Not enough data | Not enough data | Not enough data | #### Security & governance - AI Search & Retrieval Infrastructure Platforms | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Fine-grained access controls** | Not enough data | Not enough data | Not enough data | Not enough data | | **Data residency & retention policies** | Not enough data | Not enough data | Not enough data | Not enough data | | **Audit logs & retrieval traceability** | Not enough data | Not enough data | Not enough data | Not enough data | #### Operations, observability & reliability - AI Search & Retrieval Infrastructure Platforms | Feature | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Search analytics & relevance debugging** | Not enough data | Not enough data | Not enough data | Not enough data | | **High availability & disaster recovery** | Not enough data | Not enough data | Not enough data | Not enough data | --- ## Categories **Unique to KX (6):** [Columnar Databases](https://www.g2.com/categories/columnar-databases), [Time Series Intelligence Software](https://www.g2.com/categories/time-series-intelligence), [Time Series Databases](https://www.g2.com/categories/time-series-databases), [Stream Analytics Software](https://www.g2.com/categories/stream-analytics), [Real-time Analytic Database Software](https://www.g2.com/categories/real-time-analytic-database), [Vector Database Software](https://www.g2.com/categories/vector-database) **Unique to Milvus (3):** [Vector Database Software](https://www.g2.com/categories/vector-database), [AWS Marketplace Software](https://www.g2.com/categories/aws-marketplace), [ AI Search & Retrieval Infrastructure Platforms Software](https://www.g2.com/categories/ai-search-retrieval-infrastructure-platforms) **Unique to Amazon Redshift (3):** [Columnar Databases](https://www.g2.com/categories/columnar-databases), [Data Warehouse Solutions](https://www.g2.com/categories/data-warehouse), [Big Data Integration Platforms](https://www.g2.com/categories/big-data-integration-platforms) **Unique to Weaviate (2):** [Vector Database Software](https://www.g2.com/categories/vector-database), [ AI Search & Retrieval Infrastructure Platforms Software](https://www.g2.com/categories/ai-search-retrieval-infrastructure-platforms) --- ## Reviewer Demographics ### By Company Size | Segment | KX | Milvus | Amazon Redshift | Weaviate | |---|---|---|---|---| | **Small-Business** | 24.0% | 45.5% | 20.8% | 75.9% | | **Mid-Market** | 18.0% | 36.4% | 39.9% | 13.8% | | **Enterprise** | 58.0% | 18.2% | 39.3% | 10.3% | ### By Industry #### KX - **Financial Services:** 46.0% - **Banking:** 12.0% - **Capital Markets:** 10.0% - **Investment Banking:** 6.0% - **Investment Management:** 4.0% - **Computer Software:** 4.0% - **Professional Training & Coaching:** 2.0% - **Online Media:** 2.0% - **Management Consulting:** 2.0% - **Information Technology and Services:** 2.0% - **Other:** 10.0% #### Milvus - **Computer Software:** 27.3% - **Legal Services:** 9.1% - **Internet:** 9.1% - **Information Technology and Services:** 9.1% - **Financial Services:** 9.1% - **Education Management:** 9.1% - **Computer & Network Security:** 9.1% - **Business Supplies and Equipment:** 9.1% - **Aviation & Aerospace:** 9.1% #### Amazon Redshift - **Information Technology and Services:** 15.3% - **Computer Software:** 12.6% - **Financial Services:** 7.7% - **Retail:** 5.2% - **Marketing and Advertising:** 4.7% - **Telecommunications:** 4.7% - **Hospital & Health Care:** 4.4% - **Banking:** 3.8% - **Pharmaceuticals:** 2.5% - **Management Consulting:** 2.2% - **Other:** 37.0% #### Weaviate - **Computer Software:** 27.6% - **Marketing and Advertising:** 13.8% - **Consulting:** 10.3% - **Information Technology and Services:** 10.3% - **Information Services:** 6.9% - **Telecommunications:** 3.4% - **Research:** 3.4% - **Online Media:** 3.4% - **Legal Services:** 3.4% - **Insurance:** 3.4% - **Other:** 13.8% --- ## Alternatives ### Alternatives to KX - [Snowflake](https://www.g2.com/products/snowflake/reviews) — 4.6/5 stars (749 reviews) - [SAP HANA Cloud](https://www.g2.com/products/sap-hana-cloud-2025-10-01/reviews) — 4.3/5 stars (621 reviews) - [InfluxDB](https://www.g2.com/products/influxdata-influxdb/reviews) — 4.4/5 stars (101 reviews) - [Google Cloud BigQuery](https://www.g2.com/products/google-cloud-bigquery/reviews) — 4.5/5 stars (1234 reviews) - [HubSpot Data Hub](https://www.g2.com/products/hubspot-data-hub/reviews) — 4.5/5 stars (576 reviews) - [Spotfire Analytics](https://www.g2.com/products/spotfire-analytics/reviews) — 4.2/5 stars (362 reviews) - [Tealium Customer Data Hub](https://www.g2.com/products/tealium-customer-data-hub/reviews) — 4.3/5 stars (474 reviews) - [Elasticsearch](https://www.g2.com/products/elastic-elasticsearch/reviews) — 4.5/5 stars (292 reviews) - [Epsilon3](https://www.g2.com/products/epsilon3/reviews) — 4.2/5 stars (260 reviews) - [MariaDB](https://www.g2.com/products/mariadb/reviews) — 4.4/5 stars (226 reviews) ### Alternatives to Milvus - [Algolia](https://www.g2.com/products/algolia/reviews) — 4.5/5 stars (451 reviews) - [Elasticsearch](https://www.g2.com/products/elastic-elasticsearch/reviews) — 4.5/5 stars (292 reviews) - [SearchStax](https://www.g2.com/products/searchstax/reviews) — 4.5/5 stars (176 reviews) - [Redis Software](https://www.g2.com/products/redis-software/reviews) — 4.5/5 stars (134 reviews) - [SingleStore](https://www.g2.com/products/singlestore/reviews) — 4.5/5 stars (118 reviews) - [Pinecone](https://www.g2.com/products/pinecone/reviews) — 4.6/5 stars (39 reviews) - [CrateDB](https://www.g2.com/products/cratedb/reviews) — 4.4/5 stars (85 reviews) - [Supabase](https://www.g2.com/products/supabase-supabase/reviews) — 4.7/5 stars (47 reviews) - [TiDB](https://www.g2.com/products/tidb/reviews) — 4.6/5 stars (67 reviews) - [Clarifai](https://www.g2.com/products/clarifai/reviews) — 4.3/5 stars (66 reviews) ### Alternatives to Amazon Redshift - [Google Cloud BigQuery](https://www.g2.com/products/google-cloud-bigquery/reviews) — 4.5/5 stars (1234 reviews) - [Snowflake](https://www.g2.com/products/snowflake/reviews) — 4.6/5 stars (749 reviews) - [OpenText Vertica](https://www.g2.com/products/opentext-vertica/reviews) — 4.3/5 stars (216 reviews) - [Cloudera Data Platform](https://www.g2.com/products/cloudera-cloudera-data-platform/reviews) — 4.1/5 stars (136 reviews) - [Databricks](https://www.g2.com/products/databricks/reviews) — 4.6/5 stars (773 reviews) - [IBM Db2](https://www.g2.com/products/ibm-db2/reviews) — 4.1/5 stars (682 reviews) - [Teradata Vantage](https://www.g2.com/products/teradata-teradata-vantage/reviews) — 4.3/5 stars (373 reviews) - [Panoply](https://www.g2.com/products/panoply/reviews) — 4.5/5 stars (83 reviews) - [SQL Server 2019](https://www.g2.com/products/sql-server-2019/reviews) — 4.5/5 stars (83 reviews) - [IBM Netezza Performance Server](https://www.g2.com/products/ibm-netezza-performance-server/reviews) — 4.1/5 stars (84 reviews) ### Alternatives to Weaviate - [Pinecone](https://www.g2.com/products/pinecone/reviews) — 4.6/5 stars (39 reviews) - [Algolia](https://www.g2.com/products/algolia/reviews) — 4.5/5 stars (451 reviews) - [Elasticsearch](https://www.g2.com/products/elastic-elasticsearch/reviews) — 4.5/5 stars (292 reviews) - [Qdrant](https://www.g2.com/products/qdrant/reviews) — 4.5/5 stars (12 reviews) - [Supabase](https://www.g2.com/products/supabase-supabase/reviews) — 4.7/5 stars (47 reviews) - [PG Vector](https://www.g2.com/products/pg-vector/reviews) — 3.8/5 stars (12 reviews) - [SearchStax](https://www.g2.com/products/searchstax/reviews) — 4.5/5 stars (176 reviews) - [Zilliz](https://www.g2.com/products/zilliz/reviews) — 4.7/5 stars (53 reviews) - [SingleStore](https://www.g2.com/products/singlestore/reviews) — 4.5/5 stars (118 reviews) - [Redis Software](https://www.g2.com/products/redis-software/reviews) — 4.5/5 stars (134 reviews) --- ## Top Discussions ### KX No discussions available for this product. ### Milvus No discussions available for this product. ### Amazon Redshift - Title: [When can I use Amazon redshift?](https://www.g2.com/discussions/when-can-i-use-amazon-redshift) — 3 comments > **Top comment:** "You can use it in Datawarehousing. " - Title: [Should I use with a data mart for a frontend tool that make request on it ?](https://www.g2.com/discussions/should-i-use-with-a-data-mart-for-a-frontend-tool-that-make-request-on-it) — 3 comments, 3 upvotes > **Top comment:** "Hi Mehdi Can you elaborate your question? AWS Redshift is a DataBase/Data Warehouse service, which is Ideal for Analytical use cases. You can..." - Title: [What are the characteristics of redshift?](https://www.g2.com/discussions/what-are-the-characteristics-of-redshift) — 2 comments > **Top comment:** "Redshift is mainly used for Big data and analytics to store the data in columner format. Retrieve the data is very fast and parallel processing also most..." - Title: [Is Amazon redshift good for large datasets considering its cost.](https://www.g2.com/discussions/is-amazon-redshift-good-for-large-datasets-considering-its-cost) — 2 comments, 1 upvote > **Top comment:** "its costly" - Title: [What does Amazon redshift do?](https://www.g2.com/discussions/what-does-amazon-redshift-do) — 2 comments > **Top comment:** "Redshift is data warehouse where data reside on cloud and on top of that we can query the required data." ### Weaviate No discussions available for this product. --- **Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/kx-kx-vs-milvus-vs-amazon-redshift-vs-weaviate)