Yes, both Microsoft Publisher and Adobe Illustrator offer a Free Trial.
Microsoft Publisher is designed for Large Enterprises, Medium Business and Small Business.
Adobe Illustrator is designed for Individuals, Medium Business and Small Business.
Pricing for Microsoft Publisher Starts at $5/User/Month whereas for Adobe Illustrator Starts at $20.99/Month when Billed Yearly.
Some top alternatives to Microsoft Publisher includes Canva, Desygner, Adobe Illustrator, Microsoft Visio, Microsoft Sway, Qualified, Microsoft PowerPoint, Workvivo, Adobe InDesign, Canva Visual Worksuite, Slick and Draftsend.
Some top alternatives to Adobe Illustrator includes Looka, Figma, Adobe Photoshop, Canva, CorelDraw, Drawtify, Vector Ink, Vectornator Pro, Adobe After Effects, Inkscape and Adobe InDesign.