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We present an extensive search in the literature and Gaia DR2 for visualco-moving binary companions to stars hosting exoplanets and brown dwarfs within200 pc. We found 218 planet hosts out of 938 to be part of multiple-starsystems, with 10 newly discovered binaries and 2 new tertiary stellarcomponents. This represents an overall raw multiplicity rate of 23.2$\pm$1.6%for hosts to exoplanets across all spectral types, with multi-planet systemsfound to have a lower duplicity frequency at the 2.2$\sigma$ level. We foundthat more massive hosts are more often in binary configurations, and thatplanet-bearing stars in multiple systems are predominantly the most massivecomponent of stellar binaries. Investigations of multiplicity as a function ofplanet mass and separation revealed that giant planets with masses >0.1 MJupare more frequently seen in stellar binaries than small sub-Jovian planets witha 3.6$\sigma$ difference, a trend enhanced for the most massive (>7 MJup)short-period (<0.5 AU) planets and brown dwarf companions. Binarity was foundto have no significant effect on the demographics of low-mass planets (<0.1MJup) or warm and cool gas giants (>0.5 AU). While stellar companion massappears to have no impact on planet properties, binary separation seems to bean important factor in the resulting structure of planetary systems. Stellarcompanions on separations <1000 AU can play a role in the formation orevolution of massive close-in planets, while planets in wider binaries showsimilar properties to planets orbiting single stars. Finally, numerous stellarcompanions on separations <1-3 arcsec likely remain undiscovered to this date.Continuous efforts to complete our knowledge of stellar multiplicity onseparations of tens to hundreds of AU are essential to confirm the reportedtrends and further our understanding of the roles played by multiplicity onexoplanets.

The Census of Exoplanets in Visual Binaries: population trends from a volume-limited Gaia DR2 and literature search